1.
Armored car (military)
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A military armored car is a lightweight wheeled armored fighting vehicle, historically employed for reconnaissance, internal security, armed escort, and other subordinate battlefield tasks. With the gradual decline of mounted cavalry, armored cars were developed for carrying out duties formerly assigned to horsemen, following the invention of the tank, the armored car remained popular due to its comparatively simplified maintenance and low production cost. It also found favor with several colonial armies as a weapon for use in underdeveloped regions. During World War II, most armored cars were engineered for reconnaissance and passive observation, some equipped with heavier armament could even substitute for tracked combat vehicles in favorable conditions—such as pursuit or flanking maneuvers during the North African Campaign. The Motor Scout was designed and built by British inventor F. R. Simms in 1898 and it was the first armed petrol engine-powered vehicle ever built. The vehicle was a De Dion-Bouton quadricycle with a mounted Maxim machine gun on the front bar, an iron shield in front of the car protected the driver. However, these were not armored cars as the term is understood today and they were also, by virtue of their small capacity engines, less efficient than the cavalry and horse-drawn guns that they were intended to complement. At the beginning of the 20th century, the first military armored vehicles were manufactured, by adding armor and weapons to existing vehicles. The vehicle had Vickers armour 6 mm thick and was powered by a four-cylinder 3. 3-litre 16-hp Cannstatt Daimler engine, the armament, consisting of two Maxim guns, was carried in two turrets with 360° traverse. Simms Motor War Car was presented at the Crystal Palace, London, another early armored car of the period was the French Charron, Girardot et Voigt 1902, presented at the Salon de lAutomobile et du cycle in Brussels, on 8 March 1902. The vehicle was equipped with a Hotchkiss machine gun, and with 7 mm armour for the gunner, one of the first operational armoured cars with four wheel drive and fully enclosed rotating turret, was the Austro-Daimler Panzerwagen built by Austro-Daimler in 1904. It was armoured with 3-3.5 mm thick curved plates over the body and had a 4mm thick dome-shaped rotating turret that housed one or two machine-guns and it had a 4-cylinder 35 hp 4.4 litre engine giving it average cross country performance. Of note, both the driver and co-driver had adjustable seats enabling them to them to see out of the roof of the drive compartment as needed. The Italians used armored cars during the Italo-Turkish War, a great variety of armored cars appeared on both sides during World War I and these were used in various ways. Generally, the cars were used by more or less independent car commanders. However, sometimes they were used in units up to squadron size. The cars were armed with light machine guns, but larger units usually employed a few cars with heavier guns. As air power became a factor, armored cars offered a platform for antiaircraft guns
2.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
3.
M8 Greyhound
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The M8 light armored car is a 6×6 armored car produced by the Ford Motor Company during World War II. It was used by the United States and British troops in Europe, the vehicle was widely exported and as of 2006 still remains in service with some Third World countries. In British service, the M8 was known as the Greyhound, the British Army found it too lightly armored, particularly the hull floor, which anti-tank mines could easily penetrate. Nevertheless, it was produced in large numbers, the M8 Greyhounds excellent on-road mobility made it a great supportive element in the advancing American and British armored columns. It was marginal off-road, especially in mud, the requirement was for a 6×4 wheeled vehicle armed with a 37 mm gun, a coaxial machine gun mounted in a turret, and a machine gun in the front hull. Its glacis armor was supposed to fire from a.50 in machine gun. Prototypes were submitted by Studebaker, Ford and Chrysler, all of them similar in design. In April 1942, the T22 was selected, despite complaints about deficiencies, due to the need for vehicles. By then, it was clear that the 37 mm gun would not be effective against the front armor of German tanks, so, contract issues and minor design improvements delayed serial production until March 1943. In May 1942, having viewed the prototype, the British Tank Mission turned down the offer to acquire the M8 through Lend-Lease. It was named Greyhound in keeping with other U. S. armored cars already ordered by the British, such as the T18 Boarhound, the T17 Deerhound, the T17E1 Staghound, the cavalry reconnaissance troops and squadrons used by the US Army served as advance eyes and ears. This mission demanded an emphasis on speed and agility, rather than firepower, when on the march, the cavalrys mission was to make contact with enemy forces at the earliest practical moment and maintain it thereafter. In this role, the recon troops identified hostile units and reported their strength, composition, disposition, during withdrawals, the cavalry often served as a screening force for the main units. The M8 performed this function with distinction, another short-range radio set served to communicate within a cavalry reconnaissance platoon, reconnaissance team, or with headquarters. The M8 weighed 17,400 lb fully loaded with equipment and crew, on normal roads, it was capable of a sustained speed of 55 mph, hence its nickname. The M8 was not designed for combat, and its firepower was adequate only against similar lightly armored enemy vehicles. The vehicles armor provided a degree of protection against small-arms fire. With a meager.25 in of armor, the M8 was particularly vulnerable to German mines
4.
World War II
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World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the worlds countries—including all of the great powers—eventually forming two opposing alliances, the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. Marked by mass deaths of civilians, including the Holocaust and the bombing of industrial and population centres. These made World War II the deadliest conflict in human history, from late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union partitioned and annexed territories of their European neighbours, Poland, Finland, Romania and the Baltic states. In December 1941, Japan attacked the United States and European colonies in the Pacific Ocean, and quickly conquered much of the Western Pacific. The Axis advance halted in 1942 when Japan lost the critical Battle of Midway, near Hawaii, in 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained all of its territorial losses and invaded Germany and its allies. During 1944 and 1945 the Japanese suffered major reverses in mainland Asia in South Central China and Burma, while the Allies crippled the Japanese Navy, thus ended the war in Asia, cementing the total victory of the Allies. World War II altered the political alignment and social structure of the world, the United Nations was established to foster international co-operation and prevent future conflicts. The victorious great powers—the United States, the Soviet Union, China, the United Kingdom, the Soviet Union and the United States emerged as rival superpowers, setting the stage for the Cold War, which lasted for the next 46 years. Meanwhile, the influence of European great powers waned, while the decolonisation of Asia, most countries whose industries had been damaged moved towards economic recovery. Political integration, especially in Europe, emerged as an effort to end pre-war enmities, the start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland, Britain and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937, or even the Japanese invasion of Manchuria on 19 September 1931. Others follow the British historian A. J. P. Taylor, who held that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously and this article uses the conventional dating. Other starting dates sometimes used for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939, the exact date of the wars end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945, rather than the formal surrender of Japan
5.
Korean War
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The Korean War began when North Korea invaded South Korea. The United Nations, with the United States as the principal force, China came to the aid of North Korea, and the Soviet Union gave some assistance. Korea was ruled by Japan from 1910 until the days of World War II. In August 1945, the Soviet Union declared war on Japan, as a result of an agreement with the United States, U. S. forces subsequently moved into the south. By 1948, as a product of the Cold War between the Soviet Union and the United States, Korea was split into two regions, with separate governments, both governments claimed to be the legitimate government of all of Korea, and neither side accepted the border as permanent. The conflict escalated into open warfare when North Korean forces—supported by the Soviet Union, on that day, the United Nations Security Council recognized this North Korean act as invasion and called for an immediate ceasefire. On 27 June, the Security Council adopted S/RES/83, Complaint of aggression upon the Republic of Korea and decided the formation, twenty-one countries of the United Nations eventually contributed to the UN force, with the United States providing 88% of the UNs military personnel. After the first two months of war, South Korean forces were on the point of defeat, forced back to the Pusan Perimeter, in September 1950, an amphibious UN counter-offensive was launched at Inchon, and cut off many North Korean troops. Those who escaped envelopment and capture were rapidly forced back north all the way to the border with China at the Yalu River, at this point, in October 1950, Chinese forces crossed the Yalu and entered the war. Chinese intervention triggered a retreat of UN forces which continued until mid-1951, after these reversals of fortune, which saw Seoul change hands four times, the last two years of fighting became a war of attrition, with the front line close to the 38th parallel. The war in the air, however, was never a stalemate, North Korea was subject to a massive bombing campaign. Jet fighters confronted each other in combat for the first time in history. The fighting ended on 27 July 1953, when an armistice was signed, the agreement created the Korean Demilitarized Zone to separate North and South Korea, and allowed the return of prisoners. However, no treaty has been signed, and the two Koreas are technically still at war. Periodic clashes, many of which are deadly, continue to the present, in the U. S. the war was initially described by President Harry S. Truman as a police action as it was an undeclared military action, conducted under the auspices of the United Nations. In South Korea, the war is referred to as 625 or the 6–2–5 Upheaval. In North Korea, the war is referred to as the Fatherland Liberation War or alternatively the Chosǒn War. In China, the war is called the War to Resist U. S
6.
First Indochina War
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The First Indochina War began in French Indochina on 19 December 1946 and lasted until 1 August 1954. Fighting between French forces and their Viet Minh opponents in the South dated from September 1945, Japanese forces located south of that line surrendered to him and those to the north surrendered to Generalissimo Chiang Kai-shek. In September 1945, Chinese forces entered Tonkin and a small British task force landed at Saigon, the Chinese accepted the Vietnamese government under Ho Chi Minh, then in power in Hanoi. The British refused to do likewise in Saigon, and deferred to the French there from the outset, on V-J Day, September 2, Ho Chi Minh had proclaimed in Hanoi the establishment of the Democratic Republic of Vietnam. On 23 September 1945, with the knowledge of the British Commander in Saigon, French forces overthrew the local DRV government, guerrilla warfare began around Saigon immediately. The first few years of the war involved a low-level rural insurgency against the French, French Union forces included colonial troops from the whole former empire, French professional troops and units of the French Foreign Legion. The use of metropolitan recruits was forbidden by the government to prevent the war from becoming more unpopular at home. It was called the dirty war by leftists in France, the strategy of pushing the Viet Minh into attacking well-defended bases in remote parts of the country at the end of their logistical trails was validated at the Battle of Nà Sản. However, this base was relatively weak because of a lack of concrete and this combination proved fatal for this base defenses, culminating in a decisive French defeat at the Battle of Dien Bien Phu. The south continued under Emperor Bảo Đại, a year later, Bảo Đại would be deposed by his prime minister, Ngô Đình Diệm, creating the Republic of Vietnam. Soon an insurgency, backed by the North, developed against Diệms government, the conflict gradually escalated into the Vietnam War. Vietnam was absorbed into French Indochina in stages between 1858 and 1887, nationalism grew until World War II provided a break in French control. Early Vietnamese resistance centered on the intellectual Phan Bội Châu, Châu looked to Japan, which had modernized and was one of the few Asian nations to successfully resist European colonization. With Prince Cường Để, Châu started two organizations in Japan, the Duy Tân hội and Vietnam Cong Hien Hoi, due to French pressure, Japan deported Phan Bội Châu to China. Witnessing Sun Yat-sens 1911 nationalist revolution, Châu was inspired to commence the Viet Nam Quang Phục Hội movement in Guangzhou, from 1914 to 1917, he was imprisoned by Yuan Shikais counterrevolutionary government. In 1925, he was captured by French agents in Shanghai, due to his popularity, Châu was spared from execution and placed under house arrest until his death in 1940. In September 1940, shortly after Phan Bội Châus death, Japan launched its invasion of French Indochina, keeping the French colonial administration, the Japanese ruled from behind the scenes in a parallel of Vichy France. As far as Vietnamese nationalists were concerned, this was a double-puppet government, Emperor Bảo Đại collaborated with the Japanese, just as he had with the French, ensuring his lifestyle could continue
7.
Congo Crisis
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The Congo Crisis was a period of political upheaval and conflict in the Republic of the Congo between 1960 and 1965. It began almost immediately after the Congo became independent from Belgium and ended, unofficially, constituting a series of civil wars, the Congo Crisis was also a proxy conflict in the Cold War in which the Soviet Union and United States supported opposing factions. Around 100,000 people are believed to have been killed during the crisis, a nationalist movement in the Belgian Congo demanding the end of colonial rule led to the countrys independence on 30 June 1960. Minimal preparations had been made and many issues, such as the questions of federalism and ethnicity, in the first week of July, a mutiny broke out in the army and violence erupted between black and white civilians. Belgium sent troops to protect fleeing whites and two areas of the country, Katanga and South Kasai, seceded with Belgian support, the involvement of the Soviets split the Congolese government and led to impasse between Lumumba and the President, Joseph Kasa-Vubu. Mobutu, in command of the army, broke this deadlock with a coup détat, expelled the Soviet advisors, Lumumba was placed in captivity and subsequently executed in 1961. A rival government, the Free Republic of the Congo, founded by Antoine Gizenga and Lumumba supporters in the city of Stanleyville. Meanwhile, the UN took an aggressive stance towards the secessionists after Hammarskjöld was killed in a plane crash in late 1961. Supported by UN troops, Léopoldville defeated the secessionist movements in Katanga, before these could be held, however, Maoist-inspired militants calling themselves the Simbas rose up in the east of the country. The Simbas took control of a significant amount of territory and proclaimed a communist Peoples Republic of the Congo in Stanleyville, government forces gradually retook territory and, in November 1964, Belgium and the United States intervened militarily in Stanleyville to recover hostages from Simba captivity. The Simbas were defeated and collapsed soon after, following the elections in March 1965, a new political stalemate developed between Tshombe and Kasa-Vubu, forcing the government into near-paralysis. Mobutu mounted a second coup détat in November 1965, now taking personal control, under Mobutus rule, the Congo was transformed into a dictatorship which would endure until his deposition in 1997. Colonial rule in the Congo began in the late 19th century, the Belgian governments ambivalence about the idea led Leopold to eventually create the colony on his own account. Belgian rule in the Congo was based around the colonial trinity of state, missionary, the privileging of Belgian commercial interests meant that capital sometimes flowed back into the Congo and that individual regions became specialised. There was also a degree of racial segregation. Large numbers of immigrants who moved to the Congo after the end of World War II came from across the social spectrum. One of the results of the measures was the development of a new class of Europeanised African évolués in the cities. By the 1950s the Congo had a labour force twice as large as that in any other African colony
8.
Vietnam War
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It was the second of the Indochina Wars and was officially fought between North Vietnam and the government of South Vietnam. The war is considered a Cold War-era proxy war. As the war continued, the actions of the Viet Cong decreased as the role. U. S. and South Vietnamese forces relied on air superiority and overwhelming firepower to conduct search and destroy operations, involving ground forces, artillery, in the course of the war, the U. S. conducted a large-scale strategic bombing campaign against North Vietnam. The North Vietnamese government and the Viet Cong were fighting to reunify Vietnam and they viewed the conflict as a colonial war and a continuation of the First Indochina War against forces from France and later on the United States. The U. S. government viewed its involvement in the war as a way to prevent a communist takeover of South Vietnam and this was part the domino theory of a wider containment policy, with the stated aim of stopping the spread of communism. Beginning in 1950, American military advisors arrived in what was then French Indochina, U. S. involvement escalated in the early 1960s, with troop levels tripling in 1961 and again in 1962. Regular U. S. combat units were deployed beginning in 1965, despite the Paris Peace Accord, which was signed by all parties in January 1973, the fighting continued. In the U. S. and the Western world, a large anti-Vietnam War movement developed as part of a larger counterculture, the war changed the dynamics between the Eastern and Western Blocs, and altered North–South relations. Direct U. S. military involvement ended on 15 August 1973, the capture of Saigon by the North Vietnamese Army in April 1975 marked the end of the war, and North and South Vietnam were reunified the following year. The war exacted a huge human cost in terms of fatalities, estimates of the number of Vietnamese soldiers and civilians killed vary from 966,000 to 3.8 million. Some 240, 000–300,000 Cambodians,20, 000–62,000 Laotians, and 58,220 U. S. service members died in the conflict. Various names have applied to the conflict. Vietnam War is the most commonly used name in English and it has also been called the Second Indochina War and the Vietnam Conflict. As there have been several conflicts in Indochina, this conflict is known by the names of its primary protagonists to distinguish it from others. In Vietnamese, the war is known as Kháng chiến chống Mỹ. It is also called Chiến tranh Việt Nam, France began its conquest of Indochina in the late 1850s, and completed pacification by 1893. The 1884 Treaty of Huế formed the basis for French colonial rule in Vietnam for the seven decades
9.
Vehicle armour
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Military vehicles are commonly armoured to withstand the impact of shrapnel, bullets, missiles or shells, protecting the personnel inside from enemy fire. Such vehicles include armoured fighting vehicles like tanks, aircraft and ships, civilian vehicles may also be armoured. These vehicles include cars used by reporters, officials and others in conflict zones or where violent crime is common, armoured cars are also routinely used by security firms to carry money or valuables to reduce the risk of highway robbery or the hijacking of the cargo. Armour may also be used in vehicles to protect from other than a deliberate attack. Some spacecraft are equipped with specialised armour to protect them against impacts from micrometeoroids or fragments of space junk, the design and purpose of the vehicle determines the amount of armour plating carried, as the plating is often very heavy and excessive amounts of armour restrict mobility. In order to decrease this problem, some new materials and material compositions are being researched which include buckypaper, rolled homogeneous armour is strong, hard, and tough. Steel with these characteristics is produced by processing cast steel billets of appropriate size, rolling and forging irons out the grain structure in the steel, removing imperfections which would reduce the strength of the steel. Aluminium is used when weight is a necessity. It is most commonly used on APCs and armoured cars, wrought iron was used on ironclad warships. Early European iron armour consisted of 10 to 13 cm of wrought iron backed by up to one meter of solid wood, titanium is roughly the weight of aluminium, but as strong as iron. So despite being rather expensive, it finds an application in areas where weight is a concern, such as personal armour, because of its high density, depleted uranium can also be used in tank armour, sandwiched between sheets of steel armour plate. Plastic metal was a type of vehicle armour originally developed for merchant ships by the British Admiralty in 1940, the original composition was described as 50% clean granite of half-inch size, 43% of limestone mineral, and 7% of bitumen. It was typically applied in a two inches thick and backed by half an inch of steel. Plastic armour could be applied by pouring it into a cavity formed by the backing plate. Bulletproof glass is a term for glass that is particularly resistant to being penetrated when struck by bullets. The industry generally refers to it as bullet-resistant glass or transparent armour, bullet-resistant glass is usually constructed using a strong but transparent material such as polycarbonate thermoplastic or by using layers of laminated glass. The desired result is a material with the appearance and light-transmitting behaviour of standard glass, the polycarbonate layer, usually consisting of products such as Armormax, Makroclear, Cyrolon, Lexan or Tuffak, is often sandwiched between layers of regular glass. The use of plastic in the laminate provides impact-resistance, such as physical assault with a hammer, the plastic provides little in the way of bullet-resistance
10.
37 mm Gun M3
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The 37 mm Gun M3 was the first dedicated anti-tank gun fielded by United States forces in numbers. Introduced in 1940, it became the standard anti-tank gun of the U. S. infantry with its size enabling it to be pulled by a jeep. In the Pacific, where the Japanese tank threat was less significant, like many other light anti-tank guns, the M3 was widely used in the infantry support role and as an anti-personnel weapon, firing high-explosive and canister rounds. The M5 and M6 tank mounted variants were used in models of armored vehicles most notably in the Stuart Light Tank M3/M5, the Lee Medium Tank M3. In addition, the M3 in its version was mated to a number of other self-propelled carriages. In the mid-1930s, the United States Army had yet to field a dedicated anti-tank artillery piece, anti-tank companies of infantry regiments were armed with.50 in machine guns. Although there was some consideration had been given to replacing the machine guns with a more powerful anti-tank gun, Combat experience from Spain suggested that a light anti-tank gun, such as the German 37 mm PaK 35/36, was capable of neutralizing the growing threat posed by tanks. In January 1937, the Ordnance Committee recommended development of such a weapon, as the projected main user of the weapon, the Infantry Branch was chosen to oversee the work. They wanted a gun which could be moved around by the crew. The 37 mm was a caliber of anti-tank guns in the 1930s, other anti-tank guns of the same caliber included Swedish Bofors gun, Czechoslovakian vz.34. 37, Japanese Type 94 and Type 1, development and testing continued until late 1938. Several variants of gun and carriage were proposed until on 15 December a combination of the T10 gun and T5 carriage was officially adopted as the 37 mm Gun M3 and Carriage M4. Although the weapon followed the concept of the PaK36 and often referred to as a copy of it, the gun was manufactured by Watervliet Arsenal and the carriage by Rock Island Arsenal. The first pieces were delivered early in 1940, the production continued until 1943, some minor changes in the gun construction were introduced during production. The carriage received a shoulder guard and traverse controls. Although ordnance requested an upgrade of all M4 carriages to M4A1, another change was a threaded barrel end to accept a big five-port muzzle brake. Other sources mention the muzzle brake was intended to soften a recoil, in an attempt to increase the armor penetration of the M3, several squeeze bore adapters were tested, none were adopted. Experiments with rocket launchers on the M4 carriage did not produce anything practical either, the barrel was of one-piece forged construction, with uniform rifling
11.
.30-06 Springfield
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The.30 refers to the caliber of the bullet, and the 06 refers to the year the cartridge was adopted—1906. It replaced the. 30-03, 6mm Lee Navy, and. 30-40 Krag cartridges and it remains a very popular sporting round, with ammunition produced by all major manufacturers. In the early 1890s, the U. S. military adopted the smokeless powder. 30-40 Krag rimmed cartridge, the 1894 version of that cartridge used a 220-grain round-nose bullet. Around 1901, the U. S. started developing an experimental rimless cartridge for a Mauser action with box magazine and that led to the 1903. 30-03 rimless service round that used the same 220-grain round-nose bullet as the Krag. The. 30-03 achieved a velocity of 2,300 ft/s. Consequently, the round-nosed U. S. 30-03 service cartridge was falling behind. For these reasons, the U. S. military developed a new, lighter, cartridge in 1906, the cartridge was loaded with Military Rifle 21 propellant, and its maximum range was claimed to be 4,700 yd. The M1903 Springfield rifle, which had been introduced alongside the. 30-03 cartridge, was modified to accept the new. 30-06 Springfield cartridge. Modifications to the rifle included shortening the barrel at its breech and resizing the chamber, other changes to the rifle included elimination of the troublesome rod bayonet of the earlier Springfield rifles. The M1906 maximum range was originally overstated, when the M1906 cartridge was developed, the range tests had been done to only 1,800 yards, distances beyond that were estimated, but the estimate for extreme range was wrong by almost 40 percent. The range discrepancy became evident during World War I, before the widespread employment of light mortars and artillery, long-range machine gun barrage or indirect fires were considered important in U. S. infantry tactics. When the US entered World War I, it did not have machine guns, so it acquired British. When those weapons were replaced with US machine guns firing the M1906 round. Firing tests performed around 1918 at Borden Brook Reservoir, Miami, patrone was inroduced in 1914 and used a 197. 5-grain s. S. - schweres Spitzgeschoß boat-tail bullet which had a maximum range of approximately 5,140 yd. Its maximum range was approximately 5,500 yd. Additionally, wartime surplus totaled over 2 billion rounds of ammunition. Army regulations called for training use of the oldest ammunition first, as a result, the older. 30-06 ammunition was expended for training, stocks of.30 M1 Ball ammunition were allowed to slowly grow until all of the older M1906 ammunition had been fired. By 1936, it was discovered that the range of the.30 M1 Ball ammunition with its boat-tailed spitzer bullets was beyond the safety limitations of many ranges. An emergency order was made to manufacture quantities of ammunition that matched the ballistics of the earlier M1906 cartridge as soon as possible
12.
M1919 Browning machine gun
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The M1919 Browning is a.30 caliber medium machine gun that was widely used during the 20th century, especially during World War II, the Korean War, and the Vietnam War. The M1919 saw service as an infantry, coaxial, mounted, aircraft. Many M1919s were rechambered for the new 7. 62×51mm NATO round, the M1919 was an air-cooled development of the standard US machine gun of World War I, the John M. Browning-designed water-cooled M1917. The emergence of machine guns in the 1950s pushed the M1919 into secondary roles in many cases. The United States Navy also converted many to 7. 62mm NATO, many NATO countries also converted their examples to 7.62, and these remained in service well into the 1990s, as well as up to the present day in some countries. A similar conversion of the M1917 also produced the larger M2 Machine Gun, using the basic operating principles and layout. The M1919 is distinguished by its size and the use of a pierced cheese-grater-like guard around the barrel used on most versions. The M1919 originally fired the.30 cal M1906 ball cartridge, a metal M1 link was later adopted, forming a disintegrating belt. The cocking handle was pulled back with the palm of the hand facing up. This advanced the first round of the belt in front of the bolt for the extractor/ejector on the bolt to grab the first cartridge, the cocking handle was pulled and released a second time. This removed the first cartridge from the belt, advanced the next round into position to be grabbed and moved the first round down into the chamber of the ready for firing. As the bolt went into battery, the extractor grabbed the next round on the belt that was advanced and was resting in the feedway waiting to be loaded. If the trigger was held down, the gun would continue to fire in full automatic, the guns original design was as a water-cooled machine gun. When it was decided to try to lighten the gun and make it air-cooled, gunners were trained to manage the barrel heat by firing in controlled bursts of three to five rounds, with a delay between bursts to delay its heating. When the gun was ready to fire, a round would be in the chamber and the bolt and barrel group would be locked together, with the locking block at the rear of the bolt. As the assembly of bolt, barrel and barrel extension recoiled to the rear of the gun upon firing, the recoiling barrel extension struck the accelerator assembly, a half-moon shaped spring-loaded piece of metal pivoting from the receiver below the bolt and behind the barrel extension. The tips of the accelerators two curving fingers engaged the bottom of the bolt and caused it to move rapidly to the rear. The extractor-ejector was a mechanism that pivoted over the front of the bolt, the rearward movement of the bolt caused the rear end of the feed lever to pull to the right, causing the feeding pawl at the other end to move left over the belt
13.
.50 BMG
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The.50 Browning Machine Gun is a cartridge developed for the Browning.50 caliber machine gun in the late 1910s. Entering service officially in 1921, the round is based on a greatly scaled-up. 30-06 cartridge, under STANAG4383, it is a standard cartridge for NATO forces as well as many non-NATO countries. The cartridge itself has made in many variants, multiple generations of regular ball, tracer, armor-piercing, incendiary. The rounds intended for machine guns are linked using metallic links, the.50 BMG cartridge is also used in long-range target and sniper rifles, as well as other. 50-caliber machine guns. A wide variety of ammunition is available, and the availability of match grade ammunition has increased the usefulness of.50 caliber rifles by allowing more fire than lower quality rounds. Armor-piercing incendiary tracer rounds were especially effective against aircraft, and the AP rounds and API rounds were excellent for destroying concrete bunkers, structures, the API and APIT rounds left a flash, report, and smoke on contact, useful in detecting strikes on enemy targets. The rounds dimensions and ballistic traits are totally different, decades later, the.50 BMG was chambered in high-powered rifles as well. An upgraded variant of the M2 Browning HB machine gun used during World War II is still in use today. Since the mid-1950s, some armored personnel carriers and utility vehicles have made to withstand 12.7 mm machine gun fire. A skilled sniper can effectively neutralize an infantry unit by eliminating several targets without revealing his precise location, the long range between firing position and target allows time for the sniper to avoid enemy retribution by either changing positions repeatedly, or by safely retreating. A common method for understanding the power of a cartridge is by comparing muzzle energies. The.50 BMG round can produce between 10,000 and 15,000 foot pounds, depending on its powder and bullet type, the.50 BMG cartridge has a capacity of 290 grains H2O. The round is a version of the. 30-06 Springfield but uses a case wall with a long taper to facilitate feeding. The common rifling twist rate for this cartridge is 1 in 15 in, with 8 lands, the primer type specified for this ammunition is Boxer primer that has a single centralized ignition point. However, some other countries produce the ammunition with Berdan primers that have two flash holes, the proof/test pressure is listed as 65,000 psi.50 BMG cartridges are also produced commercially with a plethora of different bullets and to a number of different specifications. Cartridge, Caliber.50, Tracer, M1 Tracer for observing fire, signaling, target designation and this bullet has a red tip. Cartridge, Caliber.50, Incendiary, M1 This cartridge is used against unarmored, the incendiary bullet has a light blue tip. Cartridge, Caliber.50, Ball, M2 This cartridge is used against personnel and this bullet has an unpainted tip
14.
M2 Browning
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The M2 Machine Gun or Browning.50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning. Its design is similar to Brownings earlier M1919 Browning machine gun, the M2 uses the much larger and much more powerful.50 BMG cartridge, which was developed alongside and takes its name from the gun itself. It has been referred to as Ma Deuce, in reference to its M2 nomenclature, the design has had many specific designations, the official designation for the current infantry type is Browning Machine Gun, Cal.50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications, the M2 has been produced longer than any other machine gun. The Browning.50 caliber machine gun has been used extensively as a vehicle weapon and it was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, the Iraq War and the War in Afghanistan in the 2000s and 2010s. It is the heavy machine gun of NATO countries, and has been used by many other countries as well. The M2 has been in use longer than any firearm in U. S. inventory except the.45 ACP M1911 pistol. The current M2HB is manufactured in the U. S. by General Dynamics, Ordnance for use by the U. S. government, and for allies via Foreign Military Sales, as well as foreign manufacturers such as FN Herstal. Machine guns were used in World War I, and weapons of larger than rifle caliber were appearing. Both the British and French had large caliber machine guns, the larger rounds were needed to defeat the armor that was being introduced to the battlefield. Armor was also appearing in the skies, during World War I, the Germans introduced a heavily armored airplane, the Junkers J. I. The armor made aircraft machine guns using conventional rifle ammunition ineffective, consequently, the American Expeditionary Forces commander General John J. Pershing asked for a larger caliber machine gun. Pershing asked the Army Ordnance Department to develop a gun with a caliber of at least 0.50 inches. U. S. Col. John Henry Parker, commanding a machine gun school in France, the Army Ordnance Department ordered eight experimental Colt machine guns rechambered for the French 11 mm cartridge. The French had developed a machine gun for an even larger caliber. The French 11 mm round was found to be unsuitable because its velocity was too low, Pershing wanted a bullet of at least 670 gr and a muzzle velocity of 2,700 ft/s. Development with the French round was dropped, around July 1917, John M. Browning started redesigning his.30 caliber machine gun for a larger caliber. Winchester worked on the cartridge, which was a version of the. 30-06
15.
Petrol engine
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A petrol engine is an internal combustion engine with spark-ignition, designed to run on petrol and similar volatile fuels. In most petrol engines, the fuel and air are usually pre-mixed before compression, the process differs from a diesel engine in the method of mixing the fuel and air, and in using spark plugs to initiate the combustion process. In a diesel engine, only air is compressed, and the fuel is injected into very hot air at the end of the compression stroke, and self-ignites. The first practical petrol engine was built in 1876 in Germany by Nikolaus August Otto, although there had been attempts by Étienne Lenoir, Siegfried Marcus, Julius Hock. The first petrol engine was prototyped in 1882 in Italy by Enrico Bernardi. British engineer Edward Butler constructed the first petrol combustion engine. Butler invented the spark plug, ignition magneto, coil ignition and spray jet carburetor, with both air and fuel in a closed cylinder, compressing the mixture too much poses the danger of auto-ignition — or behaving like a diesel engine. Spark plugs are typically set statically or at idle at a minimum of 10 degrees or so of crankshaft rotation before the piston reaches T. D, higher octane petrol burns slower, therefore it has a lower propensity to auto-ignite and its rate of expansion is lower. Thus, engines designed to run high-octane fuel exclusively can achieve higher compression ratios, Petrol engines run at higher rotation speeds than diesels, partially due to their lighter pistons, connecting rods and crankshaft and due to petrol burning more quickly than diesel. However the lower compression ratios of petrol engines give petrol engines lower efficiency than diesel engines, examples, Bedford OB bus Bedford M series lorry GE 57-ton gas-electric boxcab locomotive Petrol engines may run on the four-stroke cycle or the two-stroke cycle. For details of working cycles see, Four-stroke cycle Two-stroke cycle Wankel engine Common cylinder arrangements are from 1 to 6 cylinders in-line or from 2 to 16 cylinders in V-formation. Flat engines – like a V design flattened out – are common in airplanes and motorcycles and were a hallmark of Volkswagen automobiles into the 1990s. Flat 6s are still used in many modern Porsches, as well as Subarus, less common, but notable in vehicles designed for high speeds is the W formation, similar to having 2 V engines side by side. Alternatives include rotary and radial engines the latter typically have 7 or 9 cylinders in a single ring, Petrol engines may be air-cooled, with fins, or liquid-cooled, by a water jacket and radiator. The coolant was formerly water, but is now usually a mixture of water and either ethylene glycol or propylene glycol, the cooling system is usually slightly pressurized to further raise the boiling point of the coolant. Petrol engines use spark ignition and high current for the spark may be provided by a magneto or an ignition coil. In modern car engines the ignition timing is managed by an electronic Engine Control Unit, the most common way of engine rating is what is known as the brake power, measured at the flywheel, and given in kilowatts or horsepower. This is the mechanical power output of the engine in a usable
16.
Horsepower
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Horsepower is a unit of measurement of power. There are many different standards and types of horsepower, two common definitions being used today are the mechanical horsepower, which is approximately 746 watts, and the metric horsepower, which is approximately 735.5 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of engines with the power of draft horses. It was later expanded to include the power of other types of piston engines, as well as turbines, electric motors. The definition of the unit varied among geographical regions, most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on January 1,2010, units called horsepower have differing definitions, The mechanical horsepower, also known as imperial horsepower equals approximately 745.7 watts. It was defined originally as exactly 550 foot-pounds per second [745.7 N. m/s), the metric horsepower equals approximately 735.5 watts. It was defined originally as 75 kgf-m per second is approximately equivalent to 735.5 watts, the Pferdestärke PS is a name for a group of similar power measurements used in Germany around the end of the 19th century, all of about one metric horsepower in size. The boiler horsepower equals 9809.5 watts and it was used for rating steam boilers and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit. One horsepower for rating electric motors is equal to 746 watts, one horsepower for rating Continental European electric motors is equal to 735 watts. Continental European electric motors used to have dual ratings, one British Royal Automobile Club horsepower can equal a range of values based on estimates of several engine dimensions. It is one of the tax horsepower systems adopted around Europe, the development of the steam engine provided a reason to compare the output of horses with that of the engines that could replace them. He had previously agreed to take royalties of one third of the savings in coal from the older Newcomen steam engines and this royalty scheme did not work with customers who did not have existing steam engines but used horses instead. Watt determined that a horse could turn a mill wheel 144 times in an hour, the wheel was 12 feet in radius, therefore, the horse travelled 2.4 × 2π ×12 feet in one minute. Watt judged that the horse could pull with a force of 180 pounds-force. So, P = W t = F d t =180 l b f ×2.4 ×2 π ×12 f t 1 m i n =32,572 f t ⋅ l b f m i n. Watt defined and calculated the horsepower as 32,572 ft·lbf/min, Watt determined that a pony could lift an average 220 lbf 100 ft per minute over a four-hour working shift. Watt then judged a horse was 50% more powerful than a pony, engineering in History recounts that John Smeaton initially estimated that a horse could produce 22,916 foot-pounds per minute
17.
Kilowatt
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The watt is a derived unit of power in the International System of Units defined as 1 joule per second and can be used to quantify the rate of energy transfer. Power has dimensions of M L2 T −3, when an objects velocity is held constant at one meter per second against constant opposing force of one newton the rate at which work is done is 1 watt. 1 W =1 V ⋅ A Two additional unit conversions for watt can be using the above equation. 1 W =1 V2 Ω =1 A2 ⋅ Ω Where ohm is the SI derived unit of electrical resistance, a person having a mass of 100 kilograms who climbs a 3-meter-high ladder in 5 seconds is doing work at a rate of about 600 watts. Mass times acceleration due to gravity times height divided by the time it takes to lift the object to the given height gives the rate of doing work or power. A laborer over the course of an 8-hour day can sustain an output of about 75 watts, higher power levels can be achieved for short intervals. The watt is named after the Scottish scientist James Watt for his contributions to the development of the steam engine, in 1960 the 11th General Conference on Weights and Measures adopted it for the measurement of power into the International System of Units. For additional examples of magnitude for multiples and submultiples of the watt, technologically important powers that are measured in femtowatts are typically found in reference to radio and radar receivers. For example, meaningful FM tuner performance figures for sensitivity, quieting and these input levels are often stated in dBf. This is 0.2739 microvolt across a 75-ohm load or 0.5477 microvolt across a 300-ohm load, the picowatt is equal to one trillionth of a watt. Technologically important powers that are measured in picowatts are typically used in reference to radio and radar receivers, acoustics, the nanowatt is equal to one billionth of a watt. Important powers that are measured in nanowatts are also used in reference to radio. The microwatt is equal to one millionth of a watt, compact solar cells for devices such as calculators and watches are typically measured in microwatts. The milliwatt is equal to one thousandth of a watt, a typical laser pointer outputs about five milliwatts of light power, whereas a typical hearing aid for people uses less than one milliwatt. Audio signals and other electronic signal levels are measured in dBm. The kilowatt is equal to one thousand watts and this unit is typically used to express the output power of engines and the power of electric motors, tools, machines, and heaters. It is also a unit used to express the electromagnetic power output of broadcast radio. One kilowatt is equal to 1.34 horsepower
18.
Leaf spring
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A leaf spring is a simple form of spring commonly used for the suspension in wheeled vehicles. Originally called a laminated or carriage spring, and sometimes referred to as a spring or cart spring. A leaf spring takes the form of a slender arc-shaped length of spring steel of rectangular cross-section, in the most common configuration, the center of the arc provides location for the axle, while tie holes are provided at either end for attaching to the vehicle body. For very heavy vehicles, a spring can be made from several leaves stacked on top of each other in several layers. Leaf springs can serve locating and to some extent damping as well as springing functions, while the interleaf friction provides a damping action, it is not well controlled and results in stiction in the motion of the suspension. For this reason some manufacturers have used mono-leaf springs, a leaf spring can either be attached directly to the frame at both ends or attached directly at one end, usually the front, with the other end attached through a shackle, a short swinging arm. The shackle takes up the tendency of the spring to elongate when compressed. Some springs terminated in an end, called a spoon end. There were a variety of springs, usually employing the word elliptical. Elliptical or full elliptical leaf springs referred to two circular arcs linked at their tips and this was joined to the frame at the top center of the upper arc, the bottom center was joined to the live suspension components, such as a solid front axle. Additional suspension components, such as trailing arms, would usually be needed for this design and that employed the lower arc, hence its name. As an example of leaf springs, the Ford Model T had multiple leaf springs over its differential that were curved in the shape of a yoke. As a substitute for dampers, some manufacturers laid non-metallic sheets in between the leaves, such as wood. Today leaf springs are used in heavy commercial vehicles such as vans and trucks, SUVs. For heavy vehicles, they have the advantage of spreading the load more widely over the vehicles chassis, whereas coil springs transfer it to a single point. Unlike coil springs, leaf springs also locate the axle, eliminating the need for trailing arms. A further advantage of a leaf spring over a spring is that the end of the leaf spring may be guided along a definite path. A more modern implementation is the leaf spring
19.
Ford Motor Company
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The Ford Motor Company is an American multinational automaker headquartered in Dearborn, Michigan, a suburb of Detroit. It was founded by Henry Ford and incorporated on June 16,1903, the company sells automobiles and commercial vehicles under the Ford brand and most luxury cars under the Lincoln brand. Ford also owns Brazilian SUV manufacturer, Troller, and Australian performance car manufacturer FPV, in the past, it has also produced tractors and automotive components. Ford owns an 8% stake in Aston Martin of the United Kingdom, and it also has a number of joint-ventures, one in China, one in Taiwan, one in Thailand, one in Turkey, and one in Russia. It is listed on the New York Stock Exchange and is controlled by the Ford family, Fords former UK subsidiaries Jaguar and Land Rover, acquired in 1989 and 2000 respectively, were sold to Tata Motors in March 2008. Ford owned the Swedish automaker Volvo from 1999 to 2010, in 2011, Ford discontinued the Mercury brand, under which it had marketed entry-level luxury cars in the United States, Canada, Mexico, and the Middle East since 1938. During the financial crisis at the beginning of the 21st century, it was close to bankruptcy, Ford is the second-largest U. S. -based automaker and the fifth-largest in the world based on 2015 vehicle production. At the end of 2010, Ford was the fifth largest automaker in Europe, Ford is the eighth-ranked overall American-based company in the 2010 Fortune 500 list, based on global revenues in 2009 of $118.3 billion. In 2008, Ford produced 5.532 million automobiles and employed about 213,000 employees at around 90 plants, the company went public in 1956 but the Ford family, through special Class B shares, still retain 40 percent voting rights. The Ford Motor Company was launched in a factory in 1903 with $28,000 in cash from twelve investors, most notably John. During its early years, the company produced just a few cars a day at its factory on Mack Avenue and later its factory on Piquette Avenue in Detroit, Michigan. Groups of two or three men worked on car, assembling it from parts made mostly by supplier companies contracting for Ford. Henry Ford was 39 years old when he founded the Ford Motor Company and it has been in continuous family control for over 100 years and is one of the largest family-controlled companies in the world. The first gasoline powered automobile had been created in 1885 by the German inventor Carl Benz, between 1903 and 1908, Ford produced the Models A, B, C, F, K, N, R, and S. Hundreds or a few thousand of most of these were sold per year, in 1908, Ford introduced the mass-produced Model T, which totalled millions sold over nearly 20 years. In 1927, Ford replaced the T with the Model A, Ford launched the first low-priced car with a V8 engine in 1932. In an attempt to compete with General Motors mid-priced Pontiac, Oldsmobile, Henry Ford purchased the Lincoln Motor Company in 1922, in order to compete with such brands as Cadillac and Packard for the luxury segment of the automobile market. The creation of a laboratory in Dearborn, Michigan in 1951, doing unfettered basic research
20.
Far East
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The Far East is an alternate geographical term in English, that usually refers to East Asia, the Russian Far East, and Southeast Asia. South Asia is sometimes also included for economic and cultural reasons, since the 1960s, East Asia has become the most common term for the region in international mass media outlets. Far East is often deprecated as archaic and Eurocentric, along with the terms Near East and Middle East. The term Far East came into use in European geopolitical discourse in the 12th century, for the same reason, Chinese people in the 19th and early 20th centuries called Western countries Tàixī —i. e. anything further west than the Arab world. Prior to the era, Far East referred to anything further east than the Middle East. In the 16th century, King John III of Portugal called India a rich, the term was popularized during the period of the British Empire as a blanket term for lands to the east of British India. Many European languages have terms, such as the French, Spanish, Portuguese, German, Italian, Polish, Norwegian. Significantly, the term evokes cultural as well as separation, the Far East is not just geographically distant. It never refers, for instance, to the culturally Western nations of Australia and New Zealand and this combination of cultural and geographic subjectivity was well illustrated in 1939 by Robert Menzies, a Prime Minister of Australia. Reflecting on his countrys geopolitical concerns with the onset of war, Menzies commented that, what Great Britain calls the Far East is to us the Near North. Far East in its sense is comparable to terms such as the Orient, which means East. Southeast Asia, the Russian Far East, and occasionally the Indian Subcontinent might be included in the Far East to some extent, for the people who live in that part of the world, however, it is neither East nor West and certainly not Far. A more generally acceptable term for the area is East Asia, furthermore, the United Kingdom and United States have historically used Far East for several military units and commands in the region, British Far East Command RAF Far East Air Force U. S. Far East Air Force The U. S. Coexisting Contemporary Civilizations, Arabo-Muslim, Bharati, Chinese, and Western
21.
Tank destroyer
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The tank destroyer on the other hand is specifically designed to take on enemy armour. Many are based on a tank chassis, while others are wheeled. Since World War II, gun-armed tank destroyers have fallen out of favor as armies have favored multirole main battle tanks, however, lightly armored anti-tank guided missile carriers are commonly used for supplementary long-range anti-tank work. Dedicated anti-tank vehicles made their first major appearance in the Second World War as combatants developed effective armored vehicles, some were little more than stopgap solutions, mounting an anti-tank gun on a tracked vehicle to give mobility, while others were more sophisticated designs. Except for most American designs, tank destroyers were all turretless and had fixed or casemate superstructures, the turretless design allowed accommodation of a more powerful gun, typically a dedicated anti-tank gun that had a longer barrel than could be mounted in a turreted tank on the same chassis. The lack of an increased the vehicles internal volume, allowing for increased ammunition stowage. Eliminating the turret allowed the vehicle to carry thicker armor than would otherwise be the case, sometimes there was no armored roof to keep the overall weight down to the limit that the chassis could bear. Variants of the Polish TKS and TK-3 tankettes up-armed with 20 mm gun were operationally deployed in the invasion of Poland and they were used as an anti-tank component of the reconnaissance units. Due to the defeat of France, few French vehicles were built. The Laffly W15 TCC was an attempt to build a light tank destroyer by mounting a 47 mm SA37 anti-tank gun onto a lightly armored Laffly W15T artillery tractor. Other French tank destroyers were being developed, including the SOMUA SAu-40, ARL V39, for instance,202 obsolete Panzer I light tanks were modified by removing the turret and were rebuilt as the Panzerjäger I self-propelled 4.7 cm PaK. Similarly, Panzer II tanks were used on the eastern front, captured Soviet 76.2 mm anti-tank guns were mounted on modified Panzer II chassis, producing the Marder II self-propelled anti-tank gun. The most common mounting was a German 75 mm anti-tank gun on the Czech Panzer 38 chassis to produce the Marder III, the Panzer 38 chassis was also used to make the Jagdpanzer 38 casemate style tank destroyer. The Panzerjäger series continued up to the 88 mm equipped Nashorn, German tank destroyers based on the Panzer III and later German tanks were unique in that they had more armor than their tank counterparts. One of the more successful German tank destroyers was actually designed as an artillery gun. Based on the Panzer III tank chassis, the Sturmgeschütz III was originally fitted with a low-velocity gun, later, after encountering Soviet tanks, it was refitted with a comparatively short-barreled high-velocity anti-tank gun, usually with a muzzle brake, enabling it to function as a tank destroyer. The Sturmgeschütz III from its 1938 origin used a new superstructure with an integrated design similar to the later Jagdpanzer to completely enclose the crew. It was employed in support and offensive armored operations as well as in the defensive anti-tank role
22.
M6 Gun Motor Carriage
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The 37 mm Gun Motor Carriage M6 was a modified Dodge WC52 light truck mounting a light anti-tank gun. It was used by the United States Army for infantry support and it operated from late 1942 to January 1945 in the Mediterranean, European, and Pacific theaters of World War II. The M6 saw limited use during the war, and was suited to modern warfare as it was unarmored and was armed with a too small caliber gun. The 37 mm GMC M6 was a modified 3/4-ton 4x4 Dodge WC52 truck with a rear-facing 37 mm M3 gun mounted in its bed and designated WC55. The gun was fired to the rear — it could not be fully depressed when pointed to the front of the vehicle due to blast effects on the crew. The gun fired M74 Armor Piercing Shot that could penetrate 1.4 in of armor at 500 yd, other ammunition carried throughout its service life included the Armor Piercing Capped M51 Projectile, and the High Explosive M63 Projectile. Eighty rounds of 37 mm ammunition were carried aboard, the crew-members were equipped with personal weapons for self-defense. With the design standardized in February 1942,5,380 GMC37 mm M6 GMC were built between April and October,1942, at a cost of $4,265 per unit. American doctrine planned for tank destroyers to engage enemy tanks while tanks were used principally to support infantry, the 37 mm GMC M6 saw limited employment with U. S. forces during the campaign in Tunisia in late 1942 and early 1943. The vehicle was not well liked because it lacked armor and carried a gun that was largely ineffective against German tanks of the period. The 37 mm GMC M6 also saw limited use in the Pacific Theater in 1943 and 1944, the 37 mm GMC M6 was soon classified as limited standard in September 1943, because of the availability of more powerful tank destroyers mounting 75 mm and 3 in guns. In January 1945, the GMC M6 was declared obsolete, after the Tunisian campaign, many M6 Fargos had their 37 mm gun removed and reverted to a cargo truck role as the. Some of these 37 mm guns were mounted onto halftracks to provide the infantry with a gun halftrack. Other 37 mm GMC M6 vehicles found their way into service with the French Army, despite the vehicles obvious limitations on the battlefields of Northwest Europe 1944–1945, the FFI used practically any vehicle they could obtain because of equipment shortages of all kinds. AEC Mk I Gun Carrier Deacon — British 6 pounder on armored truck of 1942, g-numbers, M-numbers Dodge WC series Notes Bibliography Zaloga, Stephen J. U. S. Tank Destroyers in Combat 1941-1945, Hong Kong, Concord Publications,1996 M6 Gun Motor Carriage at Roberts Armory
23.
Glacis
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A glacis in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a structure or of stone in more permanent structure. A glacis plate is the sloped front-most section of the hull of a tank or other armored fighting vehicle, more generally, the term glacis can denote any slope, natural or artificial, which fulfils the above requirements. The etymology of this French word suggests a slope made dangerous with ice, hence the relationship with glacier, a glacis could also appear in ancient fortresses, such as the one built at Semna, by the ancient Egyptians. Here it was used by them to prevent enemy siege engines from weakening defensive walls, ancient British hill forts started to incorporate glacis around 350 BC. Those at Maiden Castle in Dorset were 25 metres high, towards the end of the medieval period some castles were modified to make them defensible against cannons. Glacis consisting of earthen slopes faced with stones were placed in front of the curtain walls, towers were lowered to the same height as the curtain walls and converted into gun platforms. Early modern European fortresses were so constructed as to any potential assailant under the fire of the defenders until the last possible moment. This gave defenders a direct line of sight into the assaulting force, additionally, but secondarily, the bank of earth would shield the walls from being hit directly by cannon fire. Though defenders on a high ground already have a line of sight. The term glacis plate describes the sloped front-most section of the hull of a tank or other armored fighting vehicle, in a head-on-head armored engagement, the glacis plate is the largest and most obvious target available to an enemy gunner. For example, an aimed at 4 of plate steel set on a 45-degree angle will have to pass through 5.67 of material to penetrate. Anti-tank mines which employ a tilt-rod fuze are also designed to detonate directly underneath the glacis plate, as a result, it is generally the thickest, most robust armored section of a tank, followed by the turret face and gun mantlet. Fortification Siege Sloped armour Chisholm, Hugh, ed. Fortification, caen Castle, A Ten Centuries Old Fortress. Greenwood guides to historic events of the medieval world
24.
Studebaker
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Studebaker /ˈstjuːdəbeɪkər/ STEW-də-bay-kər) was an American wagon and automobile manufacturer based in South Bend, Indiana. Founded in 1852 and incorporated in 1868 under the name of the Studebaker Brothers Manufacturing Company, the company was originally a producer of wagons for farmers, miners, and the military. Studebaker entered the business in 1902 with electric vehicles and in 1904 with gasoline vehicles. Until 1911, its automotive division operated in partnership with the Garford Company of Elyria, Ohio, the first gasoline automobiles to be fully manufactured by Studebaker were marketed in August 1912. Over the next 50 years, the established a reputation for quality and reliability. After years of problems, in 1954 the company merged with luxury carmaker Packard to form Studebaker-Packard Corporation. However, Studebakers financial problems were worse than the Packard executives thought, the Packard marque was phased out, and the company returned to the Studebaker Corporation name in 1962. The South Bend plant ceased production on December 20,1963, according to the official Studebaker history written by Albert R. The last part of the name, becker, was changed to baker. In Albert Russel Erskines official history, John Studebaker, father of the five brothers, born in Adams County, in any event, John Studebaker moved to Ashland, Ohio in 1835 with his wife Rebecca and taught his five sons to make wagons. They all went into business as it grew to gigantic proportions with the country. The five sons were, in order of birth, Henry, Clement, John Mohler, Peter Everst, Clement and Henry Studebaker, Jr. became blacksmiths and foundrymen in South Bend, Indiana, in February 1852. They first made metal parts for wagons and later expanded into the manufacture of complete wagons. At this time, John M. was making wheelbarrows in Placerville, the site of his business is California Historic Landmark #142. The first major expansion in Henry and Clems South Bend business came from their being in the place to meet the needs of the California Gold Rush that began in 1849. From his wheelbarrow enterprise at Placerville, John M. had amassed $8,000. In April 1858, he quit and moved out to apply this to financing the vehicle manufacturing of H & C Studebaker, which was already booming because of a big order to build wagons for the US Army. In 1857, they had built their first carriage—Fancy, hand-worked iron trim
25.
Chrysler
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FCA US is one of the Big Three American automobile manufacturers. FCA US has its headquarters in Auburn Hills, Michigan and sells vehicles worldwide under its flagship Chrysler brand, as well as the Dodge, Jeep, other major divisions include Mopar, its automotive parts and accessories division, and SRT, its performance automobile division. The Chrysler Corporation was founded by Walter Chrysler in 1925, out of what remained of the Maxwell Motor Company, Chrysler greatly expanded in 1928, when Mr. The brand diversification efforts were inspired by Mr. Chryslers time working for General Motors, in the 1960s the company expanded into Europe, by taking control of French, British and Spanish auto companies, Chrysler Europe was sold in 1978 to PSA Peugeot Citroën for $1. Chrysler struggled through the 1970s to adapt to changing markets, increased US import competition, the company began an engineering partnership with Mitsubishi Motors, and began selling Mitsubishi vehicles branded as Dodge and Plymouth in North America. By the late 1970s, Chrysler was on the verge of bankruptcy, New CEO Lee Iacocca was credited with returning the company to profitability in the 1980s. In 1985, Diamond-Star Motors was created, further expanding the Chrysler-Mitsubishi relationship, in 1987, Chrysler acquired American Motors Corporation, which brought the profitable Jeep brand under the Chrysler umbrella. Like the other Big Three automobile manufacturers, Chrysler was hit hard by the industry crisis of 2008–2010. On June 10,2009, Chrysler emerged from the proceedings with the United Auto Workers pension fund, Fiat S. p. A. The bankruptcy resulted in Chrysler defaulting on over $4 billion in debts, by May 24,2011, Chrysler finished repaying its obligations to the U. S. government five years early, although the cost to the American taxpayer was $1.3 billion. Over the next few years Fiat gradually acquired the other parties shares while removing much of the weight of the loans in a short period. On January 1,2014, Fiat S. p. A announced a deal to purchase the rest of Chrysler from the United Auto Workers retiree health trust. The deal was completed on January 21,2014, making Chrysler Group a subsidiary of Fiat S. p. A, in May 2014, Fiat Chrysler Automobiles, NV was established by merging Fiat S. p. A. into the company. This was completed in August 2014, Chrysler Group LLC remained a subsidiary until December 15,2014, when it was renamed FCA US LLC, to reflect the Fiat-Chrysler merger. The Chrysler company was founded by Walter Chrysler on June 6,1925, Walter Chrysler arrived at the ailing Maxwell-Chalmers company in the early 1920s. He was hired to overhaul the companys troubled operations, in late 1923 production of the Chalmers automobile was ended. In January 1924, Walter Chrysler launched the well-received Chrysler automobile, the Chrysler was a 6-cylinder automobile, designed to provide customers with an advanced, well-engineered car, but at a more affordable price than they might expect. The original 1924 Chrysler included an air filter, high compression engine, full pressure lubrication
26.
Chicago
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Chicago, officially the City of Chicago, is the third-most populous city in the United States. With over 2.7 million residents, it is the most populous city in the state of Illinois, and it is the county seat of Cook County. In 2012, Chicago was listed as a global city by the Globalization and World Cities Research Network. Chicago has the third-largest gross metropolitan product in the United States—about $640 billion according to 2015 estimates, the city has one of the worlds largest and most diversified economies with no single industry employing more than 14% of the workforce. In 2016, Chicago hosted over 54 million domestic and international visitors, landmarks in the city include Millennium Park, Navy Pier, the Magnificent Mile, Art Institute of Chicago, Museum Campus, the Willis Tower, Museum of Science and Industry, and Lincoln Park Zoo. Chicagos culture includes the arts, novels, film, theater, especially improvisational comedy. Chicago also has sports teams in each of the major professional leagues. The city has many nicknames, the best-known being the Windy City, the name Chicago is derived from a French rendering of the Native American word shikaakwa, known to botanists as Allium tricoccum, from the Miami-Illinois language. The first known reference to the site of the current city of Chicago as Checagou was by Robert de LaSalle around 1679 in a memoir, henri Joutel, in his journal of 1688, noted that the wild garlic, called chicagoua, grew abundantly in the area. In the mid-18th century, the area was inhabited by a Native American tribe known as the Potawatomi, the first known non-indigenous permanent settler in Chicago was Jean Baptiste Point du Sable. Du Sable was of African and French descent and arrived in the 1780s and he is commonly known as the Founder of Chicago. In 1803, the United States Army built Fort Dearborn, which was destroyed in 1812 in the Battle of Fort Dearborn, the Ottawa, Ojibwe, and Potawatomi tribes had ceded additional land to the United States in the 1816 Treaty of St. Louis. The Potawatomi were forcibly removed from their land after the Treaty of Chicago in 1833, on August 12,1833, the Town of Chicago was organized with a population of about 200. Within seven years it grew to more than 4,000 people, on June 15,1835, the first public land sales began with Edmund Dick Taylor as U. S. The City of Chicago was incorporated on Saturday, March 4,1837, as the site of the Chicago Portage, the city became an important transportation hub between the eastern and western United States. Chicagos first railway, Galena and Chicago Union Railroad, and the Illinois, the canal allowed steamboats and sailing ships on the Great Lakes to connect to the Mississippi River. A flourishing economy brought residents from rural communities and immigrants from abroad, manufacturing and retail and finance sectors became dominant, influencing the American economy. The Chicago Board of Trade listed the first ever standardized exchange traded forward contracts and these issues also helped propel another Illinoisan, Abraham Lincoln, to the national stage
27.
Saint Paul, Minnesota
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Saint Paul is the capital and second-most populous city of the U. S. state of Minnesota. As of 2015, the estimated population was 300,851. Saint Paul is the county seat of Ramsey County, the smallest and most densely populated county in Minnesota. The city lies mostly on the east bank of the Mississippi River in the area surrounding its point of confluence with the Minnesota River, and adjoins Minneapolis, the states largest city. Known as the Twin Cities, the two form the core of Minneapolis–Saint Paul, the 16th-largest metropolitan area in the United States, with about 3.52 million residents. Founded near historic Native American settlements as a trading and transportation center, the Dakota name for Saint Paul is Imnizaska. Though Minneapolis is better-known nationally, Saint Paul contains the state government, regionally, the city is known for the Xcel Energy Center, home of the Minnesota Wild, and for the Science Museum of Minnesota. As a business hub of the Upper Midwest, it is the headquarters of such as Ecolab. Saint Paul, along with its Twin City, Minneapolis, is known for its literacy rate. It was the city in the United States with a population of 250,000 or more to see an increase in circulation of Sunday newspapers in 2007. The settlement originally began at present-day Lamberts Landing, but was known as Pigs Eye after Pierre Pigs Eye Parrant established a tavern there. Burial mounds in present-day Indian Mounds Park suggest that the area was inhabited by the Hopewell Native Americans about two thousand years ago. From the early 17th century until 1837, the Mdewakanton Dakota and they called the area I-mni-za ska dan for its exposed white sandstone cliffs. Following the Louisiana Purchase in 1803, a U. S. Army officer named Zebulon Pike negotiated approximately 100,000 acres of land from the local Dakota tribes in 1805 in order to establish a fort. The negotiated territory was located on banks of the Mississippi River, starting from Saint Anthony Falls in present-day Minneapolis, to its confluence with the Saint Croix River. Fort Snelling was built on the territory in 1819 at the confluence of the Mississippi and Minnesota Rivers, the 1837 Treaty with the Sioux ceded all local tribal land east of the Mississippi to the U. S. Government. Taoyateduta moved his band at Kaposia across the river to the south, fur traders, explorers, and missionaries came to the area for the forts protection. Many of the settlers were French-Canadians who lived nearby, however, as a whiskey trade flourished, military officers banned settlers from the fort-controlled lands
28.
Greyhound
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The Greyhound is a breed of dog, a sighthound which has been bred for coursing game and Greyhound racing. Since the rise in adoption of retired racing Greyhounds, the breed has seen a resurgence in popularity as a family pet. It is a gentle and intelligent breed whose combination of long, powerful legs, deep chest, flexible spine and slim build allows it to reach average race speeds exceeding 64 kilometres per hour. The Greyhound can reach a speed of 70 kilometres per hour within 30 metres, or six strides from the boxes. Males are usually 71 to 76 centimetres tall at the withers, females tend to be smaller, with shoulder heights ranging from 68 to 71 centimetres and weights from less than 27 to 34 kilograms. Greyhounds have very short fur, which is easy to maintain, there are approximately thirty recognized color forms, of which variations of white, brindle, fawn, black, red and blue can appear uniquely or in combination. Greyhounds are dolichocephalic, with a skull which is long in comparison to its breadth. Greyhounds can be aloof and indifferent to strangers, but are affectionate with their own pack and they are generally docile, lazy, easy-going, and calm. Greyhounds wear muzzles during racing, which can lead some to believe they are aggressive dogs, contrary to popular belief, adult Greyhounds do not need extended periods of daily exercise, as they are bred for sprinting rather than endurance. Greyhound puppies that have not been taught how to utilize their energy, however, can be hyperactive and destructive if not given an outlet, Greyhound owners and adoption groups consider Greyhounds wonderful pets. Greyhounds are quiet, gentle and loyal to owners and they are very loving, and enjoy the company of their humans and other dogs. Whether a Greyhound will enjoy the company of other animals, such as cats. Greyhounds will typically chase small animals, those lacking a high prey drive will be able to coexist happily with toy dog breeds and/or cats, many owners describe their Greyhounds as 45-mile-per-hour couch potatoes. Greyhounds live most happily as pets in quiet environments and they do well in families with children, as long as the children are taught to treat the dog properly with politeness and appropriate respect. Greyhounds have a nature, and gentle commands work best as training methods. A very common misconception regarding Greyhounds is that they are hyperactive and this is usually not the case with retired racing Greyhounds. Greyhounds can live comfortably as apartment dogs, as they do not require much space, due to their calm temperament, Greyhounds can make better apartment dogs than smaller, more active breeds. At most race tracks, Greyhounds are housed in crates, most such animals know nothing other than being in a crate for the majority of the day
29.
T18 Boarhound
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The T18 Boarhound was an American heavy armoured car produced in small numbers for the British Army during the Second World War. In July 1941 the US Army Ordnance Corps issued specifications for an armored car to be built for supply to the British. The prototype was developed in 1942 by the Yellow Coach Company and it was large 8x8 vehicle with four front wheels used for steering. Thick armor brought the weight to 26 tons, about the weight of contemporary medium tanks, initial armament consisted of a 37 mm gun M6 in a turret with a coaxial.30 inch machine gun and another.30 inch MG in the bow mount. The United States Army had never shown interest in the vehicle, the British Army placed an order for 2,500 units, but high production costs and poor cross-country performance led to cancellation of the order after only 30 were delivered to North Africa. The T18 was never used widely in combat, however a number were made use of by defending bases of operation in North Africa, there are accounts that a limited few were refitted for special duties in the rear echelon as well. None are said to have seen heavy action, the only surviving vehicle is displayed in The Tank Museum, Bovington, UK. T18 - original version with 37 mm gun, T18E2 - version with 57 mm gun. G-numbers SNL G133 George Forty - World War Two Armoured Fighting Vehicles and Self-Propelled Artillery, haugh, David T18E2 data sheet Warwheels. net Warwheels. net
30.
T17 (armored car)
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The T17 and the T17E1 were two American armored car designs produced during the Second World War. Neither saw service with frontline US forces but the latter was supplied, via the United Kingdom, to British and Commonwealth forces during the war, a number of countries used the Staghound after the war, with some of the vehicles continuing to serve into the 1980s. In July 1941, the US Army Ordnance issued specifications for an armored car alongside a specification for heavy armored car. Ford Motor Company built a six wheels, all driven prototype which was designated T17 and Chevrolet a four wheels, at the same time, the British Purchasing Commission was also looking for medium and heavy armored cars for use in the war in North Africa. Had the U. S. adopted this, it would have called the M6. The T17 was armed with a 37 mm gun in a turret, a coaxial machine gun. Power was from two Hercules JXD engines, in the interests of standardization, these replaced Fords initial 90 hp engines. The British gave the name Deerhound to the T17, the US military eventually decided to adopt the lighter M8 Greyhound vehicle instead, as an interim measure T17 production continued until M8 production could be started. These were to be supplied as International Aid but US Army tests in early 1943 showed the T17 was lacking compared to the T17E, the 250 units produced were disarmed and given to the United States Army Military Police Corps for use in the States. The British allocated the name Staghound to the T17E series, accordingly, in December the British Purchasing Commission formally requested production of 300 vehicles, the US Army authorized production of 2,000 in January 1942. The British order was confirmed in March 1942 when the pilot T17E was delivered to the Aberdeen Proving Ground, testing showed flaws but these were expected to be correctable and a further 1,500 were contracted for. This lighter vehicle would appear as the M8 Greyhound vehicle, however the British applied for T17E1 production to be continued for the United Kingdom under Lend-Lease. 3,844 Staghounds were produced in total, the Staghound was an innovative design that incorporated some advanced features. It had two rear-facing 6-cylinder engines with automatic transmissions feeding through a case to drive both axles. Either two- or four-wheel drive could be selected, either engine could be shut down while in motion and taken out of the drive train. Additionally, a power steering pump was incorporated that could be switched on or off manually from the instrument panel depending on steering conditions. Steering and suspension components were attached to the hull as the structure was rigid enough to dispense with the need for a separate chassis. As a result, it first saw service in Italy, where many units found its large physical size too restrictive in the narrow roads
31.
M38 Wolfhound
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The M38 Wolfhound was a 6x6 US armored car produced in 1944 by the Chevrolet division of General Motors. It was designed as a replacement for the M8 Greyhound series, the Wolfhound had a crew of four and was armed with a 37 mm gun in a rotating open-topped turret, with ammunition load of 93 rounds. Secondary armament consisted of two guns, one mounted co-axially with the main weapon, the other on an AA pintle mounting. It was powered by a Cadillac, 8-cylinder, water-cooled engine, each side featured three large tires on symmetrically placed axles, with distinctive curved mudguards. The frontal glacis plate was sharply sloped to improve protection, a radio antenna was mounted on the front right of the glacis. One M38 was modified to take the turret of an M24 Chaffee tank, the layout of the M38 had similarities with the Alvis Saladin, a post war British armored car, but there was no link between them. M-numbers Citations Bibliography T28/M38 Wolfhound 6x6 Armored Car warwheels. net Davis, american Tanks & AFVs of World War II. Icks, Robert J, U. S. Armoured Cars AFV Weapons Profile No,40, Profile Publishing World War II vehicles
32.
Willys MB
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The Willys MB and the Ford GPW are four-wheel drive utility vehicles that were manufactured during World War II. Produced from 1941 to 1945, it evolved post-war into the civilian Jeep CJ, advances in early 20th-century technology resulted in widespread mechanisation of the military during World War I. The United States Army deployed four-wheel drive trucks in that war, supplied by Four Wheel Drive Auto, by the eve of World War II the United States Department of War had determined it needed a light, cross-country reconnaissance vehicle. Marmon-Herrington presented five 4×4 Fords in 1937, and American Bantam delivered three Austin roadsters in 1938, recognizing the need to create standard specifications, the Army formalized its requirements on July 11,1940, and submitted them to 135 U. S. automotive manufacturers. By now the war was under way in Europe, so the Armys need was urgent and demanding, Bids were to be received by July 22, manufacturers were given 49 days to submit their first prototype and 75 days for completion of 70 test vehicles. Though Willys-Overland was the low bidder, Bantam received the bid, being the company committing to deliver a pilot model in 49 days. This presented Army officials with the first of what evolved into the World War II U. S. Army Jeeps. The contract for the new car was to be determined by trials. Moreover, in order to expedite production, the War Department forwarded the Bantam blueprints to Ford and Willys, Bantam did not dispute this move due to its precarious financial situation. By November 1940, Ford and Willys each submitted prototypes to compete with the Bantam in the Armys trials. The pilot models, the Willys Quad and the Ford Pygmy, turned out similar to each other and were joined in testing by Bantams entry. By then the U. S. and its forces were already under such pressure that all three cars were declared acceptable and orders for 1,500 units per company were given for field testing. At this time it was acknowledged the weight limit was unrealistic. For these respective pre-production runs, each vehicle received revisions and a new name, production began on March 31,1941, with a total of 2,605 built up to December 6. As the company could not meet the Armys demand for 75 Jeeps a day, production contracts were awarded to Willys. After reducing the weight by 240 pounds, Willys changed the designation to MA for Military model A. The Fords went into production as GP, with G for a Government type contract, by July 1941, the War Department desired to standardize and decided to select a single manufacturer to supply them with the next order for 16,000 vehicles. Willys won the contract due to its more powerful engine, which soldiers raved about
33.
Cant (road/rail)
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The cant of a railway track or camber of a road is the rate of change in elevation between the two rails or edges. On railways, cant helps a train steer around a curve, keeping the wheel flanges from touching the rails, minimising friction and wear. However, it may be necessary to select a value at design time. Generally the aim is for trains to run without flange contact, allowance has to be made for the different speeds of trains. Slower trains will tend to make contact with the inner rail on curves, while faster trains will tend to ride outwards. Either contact causes wear and tear and may lead to derailment, many high-speed lines do not permit slower freight trains, particularly with heavier axle loads. In some cases, the impact is reduced by the use of flange lubrication, ideally, the track should have sleepers at a closer spacing and a greater depth of ballast to accommodate the increased forces exerted in the curve. At the ends of a curve, the amount of cant cannot change from zero to its maximum immediately and it must change gradually in a track transition curve. The length of the transition depends on the maximum allowable speed—the higher the speed, the greater length is required. For the United States standard maximum unbalanced superelevation of 75 mm, for high-speed railways in Europe, maximum cant is 180 mm. Track unbalanced superelevation in the United States is restricted to 75 mm, though 102 mm is permissible by waiver. The maximum value for European railways varies by country, some of which have curves with over 280 mm of unbalanced superelevation to permit high-speed transportation, the highest values are only for tilting trains, because it would be too uncomfortable for passengers. This follows simply from a balance weight, centrifugal force and normal force. In the approximation it is assumed that the cant is small compared to the gauge of the track. In a formula this becomes v m a x ≈ r g w = g d w with d =1 / r the curvature of the track, in the United States, maximum speed is subject to specific rules. In Australia, ARTC is increasing speed around curves sharper than an 800-metre radius by replacing wooden sleepers with concrete ones so that the cant can be increased, the rails themselves are now usually canted inwards by about 10 to 5 per cent. In 1925 about 15 of 36 major American railways had adopted this practice, in civil engineering, cant is often referred to as cross slope or camber. It helps rainwater drain from the road surface, along straight or gently curved sections, the middle of the road is normally higher than the edges. This is called normal crown and helps shed rainwater off the sides of the road, on more severe bends, the outside edge of the curve is raised, or superelevated, to help vehicles around the curve
34.
M1 carbine
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The M1 carbine is a lightweight, easy to use.30 caliber semi-automatic carbine that was a standard firearm for the U. S. military during World War II, the Korean War and well into the Vietnam War. The M1 carbine was produced in variants and was widely used by not only the U. S. military. It has also been a civilian firearm. The M2 carbine is the version of the M1 carbine capable of firing in both semi-automatic and full-automatic. The M3 carbine was an M2 carbine with an infrared scope system. Despite its name and similar appearance, the M1 carbine is not a version of the M1 Garand rifle. It is a different firearm and it fires a different type of ammunition. It was simply called a carbine because it is smaller and lighter than the Garand. On July 1,1925, the U. S. Army began using the current naming system where the M is the designation for Model, therefore, the M1 rifle was the first rifle developed under this system. The M1 carbine was the first carbine developed under this system, the M2 carbine was the second carbine developed under the system, etc. Prior to World War II, U. S. Army Ordnance received reports that the full-size M1 rifle was too heavy and cumbersome for most support troops to carry. During prewar and early war field exercises, it was found that the M1 Garand impeded these soldiers mobility, as a rifle would frequently catch on brush, bang the helmet. Many soldiers found the rifle slid off the shoulder unless slung diagonally across the back, additionally, Germanys use of glider-borne and paratroop forces to launch surprise attacks behind the front lines, generated a request for a new compact infantry weapon to equip support troops. This request called for a compact, lightweight defensive weapon with greater range, accuracy and firepower than handguns, while weighing half as much as the Thompson submachine gun or the M1 rifle. The U. S. Army decided that a carbine would adequately fulfill all of these requirements, Paratroopers were also added to the list of intended users and a folding-stock version would also be developed. In 1938, the Chief of Infantry requested that the Ordnance Department develop a rifle or carbine. This led to a competition in 1941 by major U. S. firearm companies, Winchester at first did not submit a carbine design, as it was occupied in developing the. 30-06 Winchester M2 Military Rifle. The rifle originated as a design by Jonathan Ed Browning, brother of the famous firearm designer John Browning. 30-06 M2 rifle, Williams incorporated his short-stroke piston in the existing design
35.
Pintle
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A pintle is a pin or bolt, usually inserted into a gudgeon, which is used as part of a pivot or hinge. Other applications include pintle and lunette ring for towing, and pintle pins securing casters in furniture, in electrical cubicle manufacture, a pintle hinge is a hinge with fixed and moving parts. The hinge has a pin pintle and and can be external and internal. The most common type consists of 3 parts, one part on the body of the cubicle, one part on the door and the third part is the pintle. In transportation, a hitch is a type of tow hitch that uses a tow ring configuration to secure to a hook or a ball combination for the purpose of towing an unpowered vehicle. As a weapon mount a pintle-mount is used with guns as the mounting hardware that mates the machine gun to a vehicle or tripod. Essentially the pintle is a bracket with a bottom and a cradle for the gun on top. In furniture, a pintle is usually fitted to a caster, in rocketry, a pintle injector uses a single-feed fuel injector rather than the hundreds of smaller holes used in a typical rocket engine. This simplifies the engine, reducing cost and improving reliability, while surrendering some performance, grumman used the pintle-based Rocketdyne RS-18 for the Ascent stage of the Apollo Lunar Module. TRW used this same injector for the Descent Propulsion System on Apollos Lunar Module, notable modern uses are in the Merlin engines developed by SpaceX. Pintle is also a term used in the design of aircraft landing gears. It describes the attachment point between the landing gear structure and the aircraft structure, the pintle is the bolt around which the landing gear rotates when it is extended/retracted into/out of the aircraft. The pintle is a stressed component during landing manoeuvres and is often made from exotic metal alloys
36.
Turret
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In architecture, a turret is a small tower that projects vertically from the wall of a building such as a medieval castle. Turrets were used to provide a defensive position allowing covering fire to the adjacent wall in the days of military fortification. As their military use faded, turrets were used for decorative purposes, a turret can have a circular top with crenellations as seen in the picture at right, a pointed roof, or other kind of apex. The size of a turret is therefore limited by technology, since it puts additional stresses on the structure of the building and it would traditionally be supported by a corbel. Bartizan, an overhanging, wall-mounted turret found particularly on French and they returned to prominence in the 19th century with their popularity in Scottish baronial style
37.
AN-M8 smoke grenade
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The AN-M8 Smoke Grenade designated as the Army/Navy Model 8 HC Smoke Grenade is a U. S. military grenade used as a ground-to-ground or ground to air concealment or signaling device. Developed in the 1940s, using a sheet-steel cylinder body that can emit a cloud of white smoke that would last from 105 to 150 seconds. The AN-M8 was used extensively by American or other allied forces used throughout World War II to the present and it is used for smoke screening, target marking, and signalling, although the M18 colored smoke grenades are mainly used for the latter. THE AN-M8 HAND GRENADE PRODUCES HARMFUL HYDROCHLORIC FUMES THAT IRRITATES THE EYES, THROAT, IT SHOULD NOT BE USED IN CLOSED-IN AREAS UNLESS THE USERS ARE WEARING PROTECTIVE MASKS. WITH BOTH THE AN-M8 AND AN M18, THERE IS DANGER OF STARTING A FIRE IF IT IS USED IN A DRY AREA, when employing the M18 or AN-M8 HC hand grenade, it may be desirable to use one of these grenades without the fuze. To do this, the procedure should be used in combat only. Remove the fuze by unscrewing it from the grenade, ignite starter mixture with open flame. Immediately throw the grenade to avoid burn injury, aN-M18 colored smoke grenades M83 White Smoke Grenade
38.
Mk 2 grenade
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The Mk 2 grenade is a fragmentation type anti-personnel hand grenade introduced by the U. S. armed forces in 1918. It was the standard issue anti-personnel grenade used during World War II and in later conflicts, replacing the failed Mk I of 1917, it was standardized in 1920 as the Mk II, and redesignated the Mk 2 in 1945. The Mk 2 was replaced by the M26-series and later M33 series and it was phased out gradually in service beginning with the Korean War. Due to the quantity manufactured during World War 2, it was in limited standard issue with the US Army. The U. S. Navy was one of the last users when it was discontinued in 1969, the Mk II was manufactured with grooves in the cast iron to enhance fragmentation and provide a better grip handling and throwing the grenade. These gave it the appearance of a pineapple and origin of that nickname and it was also commonly referred to as a frag grenade, in contrast to the Mk 3 grenade concussion grenade. The original Mk II grenade had a 3/8-inch threaded plug in its base covering the opening used to place the explosive filling, the improved Mk IIA1 introduced in 1942 was filled through the fuse well instead. Low explosive Mk II grenades were filled with smokeless EC powder and it was initially replaced by a small length of safety fuse terminated with a black powder igniter charge. Production grenades with the EC powder filler used the M10 series of igniting fuse, High Explosive Mk IIs used flaked or granular TNT. Pre-war Mk IIs with a TNT filler were identified with a body as a warning to users. Wartime grenades were repainted olive drab for camouflage purposes with a yellow band below the fuse. Repainted grenades usually lacked the yellow band, the Mk II used the M5, M6, and M10 series fuses. These early fuses made a loud bang and produced sparks when activated and they had other problems as well. The M10-series powder train made a sound as it burned. The M5 and M6 series sometimes prematurely detonated when the flash from the hit the TNT charge rather than the delay fuse. Moisture could get in under the foil fuse cap, causing the weapon to fail to detonate, improved smokeless and silent fuses were later fitted after World War II. Mk II Grenades came 25 to a crate and were shipped in fiberboard packing tubes. TNT grenades, like all High Explosive devices, were shipped unfused to prevent accidental detonation and their fuses were shipped separately and came in flat cardboard boxes of 25
39.
M1 mine
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The M1, M1A1 and M4 are circular steel cased U. S. anti-tank blast mines with a distinctive cross shaped pressure spider. The mine was used during the Second World War and a copy produced in Argentina was used during the Falklands War, another copy is produced in China. Variants of the mine have also deployed in Chad and Tunisia. The M4 version of the mine has two secondary fuze wells so that anti-handling devices can be fitted, M1 - the mine has two filler plugs on the top surface. M1A1 - the mine has a single plug on the top surface. M4 - as the M1A1 but with two secondary fuze wells, one on the one in the bottom. Weight,4.80 kg Explosive content,2.70 kg of TNT Height,102 mm Diameter,203 mm Operating pressure,120 kg to 250 kg
40.
Allied invasion of Sicily
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The Allied invasion of Sicily, codenamed Operation Husky, was a major campaign of World War II, in which the Allies took the island of Sicily from the Axis powers. It was an amphibious and airborne operation, followed by a six-week land campaign and was the beginning of the Italian Campaign. Husky began on the night of 9/10 July 1943, and ended on 17 August, the Italian leader, Benito Mussolini, was toppled from power in Italy and the way was opened for the Allied invasion of Italy. The German leader, Adolf Hitler, canceled a major offensive at Kursk after only a week, in part to divert forces to Italy, resulting in a reduction of German strength on the Eastern Front. The plan for Operation Husky called for the assault of Sicily by two Allied armies, one landing on the south-eastern and one on the central southern coast. The amphibious assaults were to be supported by gunfire, as well as tactical bombing, interdiction. As such, the operation required a complex structure, incorporating land, naval. The overall commander was American General Dwight D. Eisenhower, as Commander-in-Chief of all the Allied forces in North Africa, British General Sir Harold Alexander acted as his second-in-command and as the 15th Army Group commander. The American Major General Walter Bedell Smith was appointed as Eisenhowers Chief of Staff, the overall Naval Force Commander was the British Admiral Sir Andrew Cunningham. The Allied land forces were from the American, British and Canadian armies, the Eastern Task Force was led by General Sir Bernard Montgomery and consisted of the British Eighth Army. The Western Task Force was commanded by Lieutenant General George S. Patton, the two task force commanders reported to Alexander as commander of the 15th Army Group. Seventh Army consisted initially of three divisions, organized under II Corps, commanded by Lieutenant General Omar Bradley. Middleton, sailed from the United States via Oran in Algeria, the 2nd Armored Division, under Major General Hugh Joseph Gaffey, also sailing from Oran, was to be a floating reserve and be fed into combat as required. On 15 July, Patton reorganized his command into two corps by creating a new Provisional Corps headquarters, commanded by his deputy army commander, Major General Geoffrey Keyes. The two divisions of XIII Corps, the 5th and 50th Infantry Divisions, commanded by Major-Generals Horatio Berney-Ficklin and Sidney Kirkman and this request was granted by the British, displacing the veteran British 3rd Infantry Division. The Red Patch Division was added to Leeses XXX Corps to become part of the British Eighth Army, in addition to the amphibious landings, airborne troops were to be flown in to support both the Western and Eastern Task Forces. To the east, the British 1st Airborne Division, commanded by Major-General George F. Hopkinson, was to seize vital bridges and high ground in support of the British Eighth Army. The initial plan dictated that the U. S. 82nd Airborne Division, Allied naval forces were also grouped into two task forces to transport and support the invading armies
41.
Theater (warfare)
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In warfare, a theater or theatre is an area or place in which important military events occur or are progressing. A theater can include the entirety of the air space, land, such a clearly defined idea as this is not capable of universal application, it is here used merely to indicate the line of distinction. Theater of operations is a sub-area within a theater of war, the boundary of a TO is defined by the commander who is orchestrating or providing support for specific combat operations within the TO. Theater of operations are divided into strategic directions or military regions depending whether its a war or peace time, the United States Armed Forces split into Unified Combatant Commands that are assigned to a particular theater of military operations. Strategic direction is a group of armies also known as task forces or battlegroups, also in the US Armed Forces the term of strategic is often associated with missile command dropping word missile out of use such as the United States Strategic Command. However it is an important strategic command that could be deployed in any theater of military operations. A strategic command or direction in general essence would combine a number of military formations or operational command. In modern military, a command is better known as a combat command that may be a combination of army groups. In a peacetime due to loss of a strategic direction fronts were transformed into military regions responsible for a section of operations. The Russian term is театр военных действий, teatr voennykh deistvii, abbreviated ТВД, as the armies advanced, both these zones and the areas into which they were divided would shift forward to new geographic areas of control
42.
Okinawa Prefecture
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The larger are mostly high islands and the smaller ones are mostly coral islands. The largest of the islands is Okinawa, the climate of the islands ranges from humid subtropical climate in the north to tropical rainforest climate in the south. Precipitation is very high, and is affected by the rainy season, the islands beyond the Tokara Strait are characterized by their coral reefs. The Amami, Okinawa, Miyako, and Yaeyama Islands have a native population collectively called the Ryukyuan people, the varied Ryukyuan languages are traditionally spoken on these islands, and the major islands have their own distinct languages. In modern times, the Japanese language is the language of the islands. The northern islands are called the Satsunan Islands, while the southern part of the chain are called the Ryukyu Islands in Japanese. Following are the grouping and names used by the Hydrographic and Oceanographic Department of the Japan Coast Guard, the islands are listed from north to south where possible. Nansei Islands Satsunan Islands Ōsumi Islands with, Tanegashima, Yaku, Kuchinoerabu, Mageshima in the North-Eastern Group and they agreed on February 15,2010, to use Amami-guntō for the Amami Islands, prior to that, Amami-shotō had also been used. The English and Japanese uses of the term Ryukyu differ, in English, the term Ryukyu may apply to the entire chain of islands, while in Japanese Ryukyu usually refers only to the islands that were previously part of the Ryūkyū Kingdom after 1624. Nansei-shotō is the name for the whole island chain in Japanese. Japan has used the name on nautical charts since 1907, based on the Japanese charts, the international chart series uses Nansei Shoto. Nansei literally means southwest, the direction of the chain from mainland Japan. Some humanities scholars prefer the uncommon term Ryūkyū-ko for the island chain. In geology, however, the Ryukyu Arc includes subsurface structures such as the Okinawa Trough, the name of Ryūkyū is strongly associated with the Ryūkyū Kingdom, a kingdom that originated from the Okinawa Islands and subjected the Sakishima and Amami Islands. The name is considered outdated in Japanese although some entities of Okinawa still bear the name. In Japanese, the Ryukyu Islands cover only the Okinawa, Miyako, the northern half of the island chain is referred to as the Satsunan Islands in Japanese, as opposed to Northern Ryukyu Islands in English. Humanities scholars generally agree that the Amami, Okinawa, Miyako, there is, however, no good name for the group. The native population do not have their own name, since they do not recognize themselves as a group this size, Ryukyu is the principal candidate because it roughly corresponds to the maximum extent of the Ryūkyū Kingdom
43.
Lend-Lease
–
This included warships and warplanes, along with other weaponry. It was signed into law on March 11,1941 and ended in September 1945, in general the aid was free, although some hardware were returned after the war. In return, the U. S. was given leases on army, Canada operated a similar smaller program under a different name. A total of $50.1 billion worth of supplies was shipped, or 17% of the total war expenditures of the U. S. In all, $31.4 billion went to Britain, $11.3 billion to the Soviet Union, $3.2 billion to France, $1.6 billion to China, and the remaining $2.6 billion to the other Allies. Reverse Lend-Lease policies comprised services such as rent on air bases that went to the U. S. and totaled $7.8 billion, of this, $6.8 billion came from the British and the Commonwealth. The terms of the agreement provided that the materiel was to be used until returned or destroyed, in practice very little equipment was returned. Supplies that arrived after the date were sold to Britain at a large discount for £1.075 billion. Canada operated a program called Mutual Aid that sent a loan of $1 billion and $3.4 billion in supplies and services to Britain. This program effectively ended the United States pretense of neutrality and was a step away from non-interventionist policy. Following the Fall of France in June 1940, the British Commonwealth and Empire were the forces engaged in war against Germany and Italy. During this same period, the U. S. government began to mobilize for war, instituting the first-ever peacetime draft. In the meantime, as the British began running short of money, arms, as one Roosevelt biographer has characterized it, If there was no practical alternative, there was certainly no moral one either. Britain and the Commonwealth were carrying the battle for all civilization, as the President himself put it, There can be no reasoning with incendiary bombs. In September 1940, during the Battle of Britain the British government sent the Tizard Mission to the United States, in December 1940, President Roosevelt proclaimed the U. S. would be the Arsenal of Democracy and proposed selling munitions to Britain and Canada. Isolationists were strongly opposed, warning it would lead to American involvement in what was seen by most Americans as an essentially European conflict. In time, opinion shifted as increasing numbers of Americans began to see the advantage of funding the British war against Germany, while staying out of the hostilities themselves. After a decade of neutrality, Roosevelt knew that the change to Allied support must be gradual, originally, the American position was to help the British but not enter the war
44.
United Kingdom
–
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, the United Kingdom includes the island of Great Britain, Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state—the Republic of Ireland. The Irish Sea lies between Great Britain and Ireland, with an area of 242,500 square kilometres, the United Kingdom is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants, together, this makes it the fourth-most densely populated country in the European Union. The United Kingdom is a monarchy with a parliamentary system of governance. The monarch is Queen Elizabeth II, who has reigned since 6 February 1952, other major urban areas in the United Kingdom include the regions of Birmingham, Leeds, Glasgow, Liverpool and Manchester. The United Kingdom consists of four countries—England, Scotland, Wales, the last three have devolved administrations, each with varying powers, based in their capitals, Edinburgh, Cardiff and Belfast, respectively. The relationships among the countries of the UK have changed over time, Wales was annexed by the Kingdom of England under the Laws in Wales Acts 1535 and 1542. A treaty between England and Scotland resulted in 1707 in a unified Kingdom of Great Britain, which merged in 1801 with the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland. Five-sixths of Ireland seceded from the UK in 1922, leaving the present formulation of the United Kingdom of Great Britain, there are fourteen British Overseas Territories. These are the remnants of the British Empire which, at its height in the 1920s, British influence can be observed in the language, culture and legal systems of many of its former colonies. The United Kingdom is a country and has the worlds fifth-largest economy by nominal GDP. The UK is considered to have an economy and is categorised as very high in the Human Development Index. It was the worlds first industrialised country and the worlds foremost power during the 19th, the UK remains a great power with considerable economic, cultural, military, scientific and political influence internationally. It is a nuclear weapons state and its military expenditure ranks fourth or fifth in the world. The UK has been a permanent member of the United Nations Security Council since its first session in 1946 and it has been a leading member state of the EU and its predecessor, the European Economic Community, since 1973. However, on 23 June 2016, a referendum on the UKs membership of the EU resulted in a decision to leave. The Acts of Union 1800 united the Kingdom of Great Britain, Scotland, Wales and Northern Ireland have devolved self-government
45.
Free France
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It was set up in London in June 1940 and also organised and supported the Resistance in occupied France. On 27 October 1940, the Empire Defense Council was constituted to organise the rule of the territories in central Africa and it was replaced on 24 September 1941 by the French National Committee. After the reconquest of North Africa, this was in turn merged with de Gaulles rival general Henri Girauds command in Algiers to form the French Committee of National Liberation. Exile officially ended with the capture of Paris by the 2nd Armoured Free French Division and Resistance forces on 25 August 1944, the Free French fought Axis and Vichy regime troops and served on battlefronts everywhere from the Middle East to Indochina and North Africa. The Free French Navy operated as a force to the Royal Navy and, in the North Atlantic. Free French units also served in the Royal Air Force, Soviet Air Force, the French Army of Africa switched allegiance to Free France, and this caused the Axis to occupy Vichy in reaction. On 1 August 1943, LArmée dAfrique was formally united with the Free French Forces to form LArmée française de la Liberation. By mid-1944, the forces of this army numbered more than 400,000, and they participated in the Normandy landings, the Free French government re-established a provisional republic after the liberation, preparing the ground for the Fourth Republic in 1946. Historically, an individual became Free French by enlisting in the military units organised by the CFN or by employment by the arm of the Committee. In many sources, Free French describes any French individual or unit that fought against Axis forces after the June 1940 armistice, postwar, to settle disputes over the Free French heritage, the French government issued an official definition of the term. Under this ministerial instruction of July 1953, only those who served with the Allies after the Franco-German armistice in 1940, between 27 May and 4 June, around 200,000 British soldiers and 140,000 French troops were evacuated from the beaches to safety in England. General Charles de Gaulle was a minister in the French cabinet during the Battle of France, as France was overwhelmed by the stunning German victory, he found himself part of a small group of politicians who argued against a negotiated surrender to Nazi Germany and Fascist Italy. That same day, the new French President of the Council, former First World War Marshal Philippe Pétain, De Gaulle briefly travelled to Bordeaux to continue the fight but, realising that Pétain would surrender, he returned to London on 17 June. On 18 June, General de Gaulle spoke to the French people via BBC radio, urging French soldiers, sailors and airmen to join in the fight against the Nazis and she has a great empire behind her. Together with the British Empire, she can form a bloc that controls the seas and she may, like England, draw upon the limitless industrial resources of the United States. In Vichys case those reasons were compounded with ideas of a Révolution nationale about stamping out Frances republican heritage. On 22 June 1940, Marshall Pétain signed an armistice with Germany, followed by a one with Italy on 24 June. After a parliamentary vote on 10 July, Pétain became leader of the newly established authoritarian regime known as Vichy France, despite de Gaulles call to continue the struggle, few French forces, at least initially, pledged their support
46.
Brazil
–
Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. As the worlds fifth-largest country by area and population, it is the largest country to have Portuguese as an official language. Its Amazon River basin includes a vast tropical forest, home to wildlife, a variety of ecological systems. This unique environmental heritage makes Brazil one of 17 megadiverse countries, Brazil was inhabited by numerous tribal nations prior to the landing in 1500 of explorer Pedro Álvares Cabral, who claimed the area for the Portuguese Empire. Brazil remained a Portuguese colony until 1808, when the capital of the empire was transferred from Lisbon to Rio de Janeiro, in 1815, the colony was elevated to the rank of kingdom upon the formation of the United Kingdom of Portugal, Brazil and the Algarves. Independence was achieved in 1822 with the creation of the Empire of Brazil, a state governed under a constitutional monarchy. The ratification of the first constitution in 1824 led to the formation of a bicameral legislature, the country became a presidential republic in 1889 following a military coup détat. An authoritarian military junta came to power in 1964 and ruled until 1985, Brazils current constitution, formulated in 1988, defines it as a democratic federal republic. The federation is composed of the union of the Federal District, the 26 states, Brazils economy is the worlds ninth-largest by nominal GDP and seventh-largest by GDP as of 2015. A member of the BRICS group, Brazil until 2010 had one of the worlds fastest growing economies, with its economic reforms giving the country new international recognition. Brazils national development bank plays an important role for the economic growth. Brazil is a member of the United Nations, the G20, BRICS, Unasul, Mercosul, Organization of American States, Organization of Ibero-American States, CPLP. Brazil is a power in Latin America and a middle power in international affairs. One of the worlds major breadbaskets, Brazil has been the largest producer of coffee for the last 150 years and it is likely that the word Brazil comes from the Portuguese word for brazilwood, a tree that once grew plentifully along the Brazilian coast. In Portuguese, brazilwood is called pau-brasil, with the word brasil commonly given the etymology red like an ember, formed from Latin brasa and the suffix -il. As brazilwood produces a red dye, it was highly valued by the European cloth industry and was the earliest commercially exploited product from Brazil. The popular appellation eclipsed and eventually supplanted the official Portuguese name, early sailors sometimes also called it the Land of Parrots. In the Guarani language, a language of Paraguay, Brazil is called Pindorama
47.
Arc de Triomphe
–
The Arc de Triomphe should not be confused with a smaller arch, the Arc de Triomphe du Carrousel, which stands west of the Louvre. Beneath its vault lies the Tomb of the Unknown Soldier from World War I and it set the tone for public monuments with triumphant patriotic messages. Inspired by the Roman Arch of Titus, the Arc de Triomphe has an height of 50 metres, width of 45 m. The smaller transverse vaults are 18.68 m high and 8.44 m wide, three weeks after the Paris victory parade in 1919, Charles Godefroy flew his Nieuport biplane under the archs primary vault, with the event captured on newsreel. Pariss Arc de Triomphe was the tallest triumphal arch until the completion of the Monumento a la Revolución in Mexico City in 1938, the Arch of Triumph in Pyongyang, completed in 1982, is modelled on the Arc de Triomphe and is slightly taller at 60 m. The Arc is located on the bank of the Seine at the centre of a dodecagonal configuration of twelve radiating avenues. It was commissioned in 1806 after the victory at Austerlitz by Emperor Napoleon at the peak of his fortunes, the architect, Jean Chalgrin, died in 1811 and the work was taken over by Jean-Nicolas Huyot. On 15 December 1840, brought back to France from Saint Helena, prior to burial in the Panthéon, the body of Victor Hugo was displayed under the Arc during the night of 22 May 1885. The sword carried by the Republic in the Marseillaise relief broke off on the day, it is said, the relief was immediately hidden by tarpaulins to conceal the accident and avoid any undesired ominous interpretations. On 7 August 1919, Charles Godefroy successfully flew his biplane under the Arc, Jean Navarre was the pilot who was tasked to make the flight, but he died on 10 July 1919 when he crashed near Villacoublay while training for the flight. Following its construction, the Arc de Triomphe became the point of French troops parading after successful military campaigns. Famous victory marches around or under the Arc have included the Germans in 1871, the French in 1919, the Germans in 1940, and the French and Allies in 1944 and 1945. A United States postage stamp of 1945 shows the Arc de Triomphe in the background as victorious American troops march down the Champs-Élysées, after the interment of the Unknown Soldier, however, all military parades have avoided marching through the actual arch. The route taken is up to the arch and then around its side, out of respect for the tomb, both Hitler in 1940 and de Gaulle in 1944 observed this custom. By the early 1960s, the monument had grown very blackened from coal soot and automobile exhaust, and during 1965–1966 it was cleaned through bleaching. In the prolongation of the Avenue des Champs-Élysées, a new arch, after the Arc de Triomphe du Carrousel and the Arc de Triomphe de lÉtoile, the Grande Arche is the third arch built on the same perspective. In 1995, the Armed Islamic Group of Algeria placed a bomb near the Arc de Triomphe which wounded 17 people as part of a campaign of bombings, the astylar design is by Jean Chalgrin, in the Neoclassical version of ancient Roman architecture. Major academic sculptors of France are represented in the sculpture of the Arc de Triomphe, Jean-Pierre Cortot, François Rude, Antoine Étex, James Pradier and Philippe Joseph Henri Lemaire
48.
Liberation of Paris
–
The Liberation of Paris was a military action that took place during World War II from 19 August 1944 until the German garrison surrendered the French capital on 25 August 1944. Paris had been ruled by Nazi Germany since the signing of the Second Compiègne Armistice on 22 June 1940, after which the Wehrmacht occupied northern and western France. On the night of 24 August, elements of General Philippe Leclercs 2nd French Armored Division, made its way into Paris, the next morning,25 August, the bulk of the 2nd Armored Division and US 4th Infantry Division entered the city. Although the Allied strategy emphasized destroying German forces retreating towards the Rhine, General Dwight D. Eisenhower, the Supreme Commander of the Supreme Headquarters Allied Expeditionary Force, did not consider the liberation of Paris to be a primary objective. The goal of the U. S. and British Army was to destroy the German forces, and therefore end World War II in Europe, General Eisenhower stated that it was too early for an assault on Paris. He was aware that Adolf Hitler had ordered the German military to completely destroy Paris should the Allies attack, Paris was considered to have too great a value, culturally and historically, to risk its destruction. General Eisenhower was keen to avoid a battle of attrition. Basic utilities would have to be restored, and transportation systems rebuilt, all of these supplies were desperately needed in other areas of the war effort. General Charles de Gaulle of the French Army threatened to order the French 2nd Armored Division to attack Paris and that same day, employees of the Paris Métro, the Gendarmerie, and police went on strike, postal workers followed the next day. They were soon joined by workers across the city, causing a general strike to break out on 18 August, on 16 August,35 young FFI members were betrayed by an agent of the Gestapo. They had gone to a meeting near the grande cascade in the Bois de Boulogne. There, they were executed by German machine-guns and then finished off with hand grenades, when Choltitz told them that he intended to slow the Allied advance as much as possible, Taittinger and Raoul Nordling attempted to persuade Choltitz not to destroy Paris. All over France, from the BBC and the Radiodiffusion nationale, on 19 August, continuing their retreat eastwards, columns of German vehicles moved down the Champs Élysées. Posters calling citizens to arm had previously been pasted on walls by FFI members, other posters assured that victory is near and promised chastisement for the traitors, i. e. Vichy loyalists, and collaborators. Then, the first skirmishes between the French and the German occupiers began, during the fighting, small mobile units of the Red Cross moved into the city to assist the French and Germans who were wounded. That same day in Pantin, a filled with mines exploded and destroyed the Great Windmills. On 20 August, as began to appear, Resistance fighters organized themselves to sustain a siege. Trucks were positioned, trees cut down, and trenches were dug in the pavement to free paving stones for consolidating the barricades and these materials were transported by men, women, and children using wooden carts
49.
M3 Scout Car
–
The M3 Scout Car was an armored car in U. S. service during World War II. It was also known as the White Scout Car, after its manufacturer and it was used in various roles, including patrol, scouting, command vehicle, ambulance and gun tractor. Design of the vehicle began at the White Motor Company, based in Cleveland, the wheelbase was 131 in, tread 65.25 in. The wheels were 8.5 in wide,20 in diameter, fuel capacity was 30 US gal. The original order was for 64 units, all of which were given to the 7th Cavalry Brigade, eventually, the Army decided to adopt an improved version, designated M3A1. The new version had a longer and wider hull, in front of the bumper an unditching roller was mounted. The M3A1 could carry up to seven infantry and provide support with three machine guns - one.50 caliber and two.30 caliber - mounted on a skate rail around the hull. Production of the M3A1 started in 1940 and lasted until 1944, the design influenced the later U. S. halftrack designs, such as the M3 halftrack and the post-World War II Soviet BTR-40. The early M2 halftrack copied the layout as well as the skate rail machine gun mounts. It was used in traditional roles, such as scouting and screening. By mid-1943, the drawbacks of the design - its open top, poor off-road mobility, during 1943, most US Army units replaced the M3A1 with the M8 armored car and similar M20 Utility Car. A small number of M3A1s were retained and employed in Normandy, a few M3A1s were used by the US Marine Corps in the Pacific theater, but none saw combat. The Chinese Nationalist Army was supplied with M3 Scout Cars from the US since 1942 and they used the M3 during both the Second Sino-Japanese War and the Chinese Civil War. The M3A1 was also supplied via lend-lease channels to the Soviet Union and they were also used to equip Free French Forces, as well as Belgian, Czechoslovak and Polish units. After the war, many vehicles were sold, mostly to Asian, in Red Army service, the car was used primarily as a reconnaissance vehicle, but also as a gun tractor for the ZIS-3 76-mm field gun. It remained in service throughout the war. In British and French service, M3A1s were used as vehicles for field artillery observers, as ambulances. A few vehicles were used by Israel in the 1948 Arab–Israeli War, at least one Israeli M3A1 was modified with top armor and a revolving turret
50.
Land mine
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A land mine is an explosive device concealed under or on the ground and designed to destroy or disable enemy targets, ranging from combatants to vehicles and tanks, as they pass over or near it. Such a device is typically detonated automatically by way of pressure when a target steps on it or drives over it, a land mine may cause damage by direct blast effect, by fragments that are thrown by the blast, or by both. The name originates from the ancient practice of mining, where tunnels were dug under enemy fortifications or troop formations. These killing tunnels were at first collapsed to destroy targets located above, nowadays, in common parlance, land mine generally refers to devices specifically manufactured as anti-personnel or anti-vehicle weapons. The use of mines is controversial because of their potential as indiscriminate weapons. They can remain dangerous many years after a conflict has ended, harming the economy, to date,162 nations have signed the treaty. To act as passive area-denial weapons, land mines are currently used in large quantities mostly for this first purpose, thus their widespread use in the demilitarized zones of likely flashpoints such as Cyprus, Afghanistan and Korea. As of 2013, the governments that still laid land mines were Myanmar in its internal conflict. Land mines continue to kill or injure at least 4,300 people every year, even decades after the ends of the conflicts for which they were placed. This claim is dubious, as gunpowder warfare did not develop in China until the advent of the flamethrower in the 10th century, while the land mine was not seen in China until the late 13th century. Explosive land mines were being used in 1277 by the Chinese during the Song dynasty against an assault of the Mongols, the invention of this detonated enormous bomb was credited to one Lou Qianxia of the 13th century. The wad of the mine was made of wood, carrying three different fuses in case of defective connection to the touch hole. Pieces of bamboo are sawn into sections nine feet in length, all septa in the bamboo being removed, save only the last, boiling oil is next poured into and left there for some time before being removed. The fuse starts from the bottom, and is compressed into it to form an explosive mine, the gunpowder fills up eight-tenths of the tube, while lead or iron pellets take up the rest of the space, then the open end is sealed with wax. A trench five feet in depth is dug, the fuse is connected to a firing device which ignites them when disturbed. Further description of how this flint device operated was not made until a Chinese text of 1606 AD revealed that a drive had been used to work the steel wheel. Besides the use of steel wheels providing sparks for the fuses, there were other methods used as well, when the weapons were removed from the mound, this movement disturbed the bowl beneath them where the butt ends of the staffs were, which in turn ignited the fuses. According to the Wubei Huolongjing volume of the 17th century, the formula for this slow-burning incandescent material allowed it to burn continuously for 20 to 30 days without going out
Colombia[9]
Guatemala: Some donated by the US after World War II.[1]
Paraguay: 12[14]
Peru: 30[14][15]
Algeria: Some donated by France.[1]
Austria: 25[14]
Belgium: Utilized primarily by the Belgian Air Component for base security, as well as the Force Publique.[1]
Benin: 15; donated by France.[14]
Brazil: 20[9][1]
Burkina Faso: 10; donated by France.[14]
Cambodia: 5[14]
Cameroon: 10[14]
Canada[1]
Democratic Republic of the Congo[9]
Cuba: 20[14]
Cyprus: Some donated by Greece and later modernized by an American firm.[1]
El Salvador[1]
Ethiopia: 15;[14] modernized in the 1960s with diesel engines.[1]
France: 894; 689 M8s and 205 M20s.[1]
Nazi Germany: Captured during World War II.[1] Some used as dedicated air defense vehicles.[6]
West Germany: Inherited from the Wehrmacht; used by the Bundesgrenzschutz.[1]
Greece: 207[1]
Haiti[1]
Indonesia[16]used by the Indonesian Police
Iran: 100[14]
Italy: Some donated by the US after World War II.[1]
Ivory Coast: 15; donated by France.[14]
Jamaica[1]
Katanga[10]
Laos: 15; donated by France.[14]
Madagascar: 15; donated by France.[14]
Mauritania: 15[14]
Mexico: 50[15]
Morocco: 55; some purchased from both France and the US.[14]
Niger: 8; donated by France.[14]
Norway[9]
Portugal: Some donated by the US as part of a NATO assistance program.[1]
Saudi Arabia[9]
Senegal: 10; donated by France.[14]
South Korea: 200[14]
South Vietnam: Estimates range from 75 to 125 in service.[14]
Thailand: 50[14]
Togo: 6[14]
Tunisia: 10[14]
Turkey[9]
United Kingdom: 496[1]
United Nations Operation in the Congo (ONUC)[1]
Venezuela: 15[14]
Vietnam: Presumably inherited from the defunct Army of the Republic of Vietnam (ARVN).[9]
Yugoslavia: 150[14]
