1.
Howitzer
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In the taxonomies of artillery pieces used by European armies in the 17th to 20th centuries, the howitzer stood between the gun and the mortar. Howitzers, like other artillery equipment, are organized in groups called batteries. The English word howitzer comes from the Czech word houfnice, from houf, crowd, haufen, sometimes in the compound Gewalthaufen, also designated a pike square formation in German. This is particularly true in the forces of the United States. Because of this practice, the howitzer is used in some armies as a generic term for any kind of artillery piece that is designed to attack targets using indirect fire. Thus, artillery pieces that bear resemblance to howitzers of earlier eras are now described as howitzers. Most other armies in the reserve the word howitzer for guns with barrel lengths 15 to 25 times their caliber. The British had a method of nomenclature. In the 18th century, they adopted projectile weight for guns replacing the old naming system of culverin, saker, mortars had been categorized by calibre in inches in the 17th century and this was inherited by howitzers. The modern howitzers were invented in Sweden towards the end of the 17th century, originally intended for use in siege warfare, they were particularly useful for delivering cast-iron shells filled with gunpowder or incendiary materials into the interior of fortifications. In the middle of the 18th century, a number of European armies began to introduce howitzers that were enough to accompany armies in the field. Though usually fired at the high angles of fire used by contemporary siege howitzers. Rather, as the guns of the day were usually restricted to inert projectiles. Many, for the sake of simplicity and rapidity of fire, the Abus gun was an early form of howitzer in the Ottoman Empire. In 1758 the Russian Empire introduced a type of howitzer, with a conical chamber, called a licorne. The most famous of these gun-howitzers was the Napoleon 12-pounder, a weapon of French design that saw service in the American Civil War. The longest-serving artillery piece of the 19th century was the mountain howitzer, in 1859, the armies of Europe began to rearm field batteries with rifled field guns. These new field pieces used cylindrical projectiles that, while smaller in caliber than the spherical shells of smoothbore field howitzers, moreover, their greater range let them create many of the same effects that previously required the sharply curved trajectories of smoothbore field howitzers
2.
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
3.
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
4.
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
5.
Cambodian Civil War
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The struggle was complicated by the influence and actions of the allies of the two warring sides. The Cambodian coup of 18 March 1970 put a pro-American, anti-North Vietnamese government in power, the North Vietnamese Army was now threatened by a newly unfriendly Cambodian government. The North Vietnamese turned over some of their conquests and provided assistance to the Khmer Rouge. The Cambodian government hastened to expand its army to combat the North Vietnamese, the U. S. was motivated by the desire to buy time for its withdrawal from Southeast Asia, to protect its ally in South Vietnam, and to prevent the spread of communism to Cambodia. American and both South and North Vietnamese forces directly participated in the fighting, the U. S. assisted the central government with massive U. S. aerial bombing campaigns and direct material and financial aid. After five years of fighting, the Republican government was defeated on 17 April 1975 when the victorious Khmer Rouge proclaimed the establishment of Democratic Kampuchea. The Cambodian civil war led to the Cambodian Genocide, one of the bloodiest in history, during the early-to-mid-1960s, Prince Norodom Sihanouks policies had protected his nation from the turmoil that engulfed Laos and South Vietnam. On 3 May 1965, Sihanouk broke diplomatic relations with the U. S. ended the flow of American aid, and turned to the PRC, by the late 1960s, Sihanouks delicate domestic and foreign policy balancing act was beginning to go awry. He had also agreed to allow the use of the port of Sihanoukville by communist-flagged vessels delivering supplies and these concessions made questionable Cambodias neutrality, which had been guaranteed by the Geneva Conference of 1954. Sihanouk was convinced that the PRC, not the U. S, on 11 September, Cambodia held its first open election. Through manipulation and harassment the conservatives won 75 percent of the seats in the National Assembly, the prince then found himself in a political dilemma. One of Lon Nols first priorities was to fix the economy by halting the illegal sale of rice to the communists. Soldiers were dispatched to the areas to forcibly collect the harvests at gunpoint. On 11 March 1967, while Sihanouk was out of the country in France, a rebellion broke out in the area around Samlaut in Battambang, with the probable encouragement of local communist cadres, the insurrection quickly spread throughout the whole region. Lon Nol, acting in the absence, responded by declaring martial law. Hundreds of peasants were killed and whole villages were laid waste during the repression, simultaneously, Sihanouk ordered the arrest of Chinese middlemen involved in the illegal rice trade, thereby raising government revenues and placating the conservatives. Lon Nol was forced to resign, and, in a typical move, the immediate crisis had passed, but it engendered two tragic consequences. First, it drove thousands of new recruits into the arms of the maquis of the Cambodian Communist Party
6.
Laotian Civil War
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The Laotian Civil War was fought between the Communist Pathet Lao and the Royal Lao Government, with both sides receiving heavy external support in a proxy war between the global Cold War superpowers. It is called the Secret War among the CIA Special Activities Division, the Kingdom of Laos was a covert theatre for other belligerents during the Vietnam War. The Franco–Lao Treaty of Amity and Association transferred remaining French powers to the Royal Lao Government, However, this government did not include representatives from the Lao Issara anti-colonial armed nationalist movement. Several attempts were made to establish coalition governments, and a government was finally seated in Vientiane. The actual fighting in Laos involved the North Vietnamese Army, U. S. Thai, the North Vietnamese Army occupied the area to use for its Ho Chi Minh Trail supply corridor and as staging area for offensives into South Vietnam. There was a major theater of action on and near the northern Plain of Jars. The North Vietnamese and Pathet Lao eventually emerged victorious in 1975, the Geneva Conference established Laotian neutrality. The Peoples Army of Vietnam, however, continued to operate in northern and southeastern Laos. North Vietnam established the Ho Chi Minh Trail as a highway in the southeast of Laos. The Trail was designed to allow North Vietnamese troops and supplies to infiltrate the Republic of Vietnam, North Vietnam also had a sizable military effort in northern Laos, while sponsoring and maintaining an indigenous communist rebellion, the Pathet Lao, to put pressure on the Royal Lao Government. The U. S. S. interests in the war in Vietnam, the status of the war in the north throughout the year generally depended on the weather. When the rainy season six months later rendered North Vietnamese supply lines inoperable, other air strikes were planned ahead. Overall coordination of the air campaign was directed by an Airborne Command and Control Center, the denials were seen as necessary considering that the North Vietnamese government and the U. S. had both signed agreements specifying the neutrality of Laos. U. S. involvement was considered necessary because the DRV had effectively conquered a large part of the country and was equally obfuscating its role in Laos, despite these denials, however, the Civil War was actually the largest U. S. The end of World War II left Laos in political chaos, the French, who had been displaced from their protectorate by the Japanese, wanted to resume control of Laos, and sponsored guerrilla forces to regain control. The Japanese had proclaimed Laos independent even as they lost the war, though King Sisavang Vong thought Laos was too small for independence he had proclaimed the end of the French protectorate status though he favored the French return. He let it be known he would accept independence if it should occur, thus there was a nascent movement for independence amid the turmoil. Underlying all this was an undercurrent of Vietnamese involvement
7.
Lebanese Civil War
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The Lebanese Civil War was a multifaceted civil war in Lebanon, lasting from 1975 to 1990 and resulting in an estimated 120,000 fatalities. As of 2012, approximately 76,000 people remain displaced within Lebanon, there was also an exodus of almost one million people from Lebanon as a result of the war. The government of Lebanon had been run under a significant influence of the elites among the Maronite Christians, however, the country had a large Muslim population and many pan-Arabist and left-wing groups opposed the pro-western government. Fighting between Maronite and Palestinian forces began in 1975, then Leftist, pan-Arabist and Muslim Lebanese groups formed an alliance with the Palestinians, during the course of the fighting, alliances shifted rapidly and unpredictably. Furthermore, foreign powers, such as Israel and Syria, became involved in the war, Peace keeping forces, such as the Multinational Force in Lebanon & UNIFIL, were also stationed in Lebanon. The 1989 Taif Agreement marked the beginning of the end of the fighting, in January 1989, a committee appointed by the Arab League began to formulate solutions to the conflict. In March 1991, parliament passed an amnesty law that all political crimes prior to its enactment. In May 1991, the militias were dissolved, with the exception of Hezbollah, religious tensions between Sunnis and Shias remained after the war. An 1860 civil war between Druze and Maronites erupted in the Ottoman Mutasarrifate of Mount Lebanon, which had been divided between them in 1842 and it resulted in the massacre of about 10,000 Christians and at least 6,000 Druzes. The 1860 war was considered by the Druze as a military victory, World War I was hard for the Lebanese. While the rest of the world was occupied with the World War, with the defeat and dissolution of the Ottoman Empire, Turkish rule ended. France took control of the area under the French Mandate for Syria, the French created the state of Greater Lebanon as a safe haven for the Maronites, but included a large Muslim population within the borders. In 1926, Lebanon was declared a republic, and a constitution was adopted, however, the constitution was suspended in 1932. Various factions sought unity with Syria, or independence from the French, in 1934, the countrys first census was conducted. In 1936, the Maronite Phalange party was founded by Pierre Gemayel, World War II and the 1940s brought great change to Lebanon and the Middle East. Lebanon was promised independence and on 22 November 1943, during World War II, Free French troops, who had invaded Lebanon in 1941 to rid Beirut of the Vichy French forces, left the country in 1946. The Maronites assumed power over the country and economy, a parliament was created, in which both Muslims and Christians each had a set quota of seats. Accordingly, the President was to be a Maronite, the Prime Minister a Sunni Muslim, the United Nations Partition Plan for Palestine in late 1947 led to civil war in Palestine, the end of Mandatory Palestine, and the Israeli Declaration of Independence on 14 May 1948
8.
Rock Island Arsenal
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The Rock Island Arsenal comprises 946 acres, located on Arsenal Island, originally known as Rock Island, on the Mississippi River between the cities of Davenport, Iowa, and Rock Island, Illinois. It lies within the state of Illinois and it is home of First Army headquarters. The island was established as a government site in 1816. It is now the largest government-owned weapons manufacturing arsenal in the United States and it has manufactured military equipment and ordnance since the 1880s. In 1919–1920 one hundred of the Anglo-American or Liberty Mark VIII tanks were manufactured and it is designated as a National Historic Landmark. Established as both an arsenal and a center for the manufacture of leather accoutrements and field gear, today it provides manufacturing, logistics, the Arsenal is the only active U. S. Some of the Arsenals most successful products include the M198 and M119 towed howitzers, about 250 military personnel and 6,000 civilians work there. The 2000 census population was 145, from the autobiography of Black Hawk, When we arrived we found that the troops had come to build a fort on Rock Island. It was our garden, like the people have near their big villages. The island facilities were converted and built in 1863, they were not yet completed in December of that year, the first prisoners were 468 Confederates captured in battles at Chattanooga, Tennessee. That month more than 5,000 Confederates would swell the population of Rock Island military prison and they were kept in 84 barracks, each holding around 100 prisoners. A total of 41 Confederate prisoners successfully escaped during the prison’s operation, most died from disease, since sanitation was primitive as in all army encampments, and exposure to heat and humidity during the summers and freezing temperatures during winters. In 1864, deadly smallpox epidemics raged through the prison, the prison camp operated from December 1863 until July 1865, when the last prisoners were freed. After the war, the facility was completely destroyed. During its two years in operation, the camp housed a total of more than 12,400 Confederates. Following the war, the government retained ownership of Arsenal Island and developed it for use as an arsenal and ordnance manufacturing center. The Rock Island Arsenal Museum was established on July 4,1905 and it is the second-oldest US Army Museum in the US after the West Point Museum. The museum has been closed twice, during World War I and World War II, exhibits interpret the history of Rock Island Arsenal and the Union prison camp during the American Civil War, and the sites role as a military industrial facility
9.
Gun barrel
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A gun barrel is a part of firearms and artillery pieces. The hollow interior of the barrel is called the bore, a gun barrel must be able to hold in the expanding gas produced by the propellants to ensure that optimum muzzle velocity is attained by the projectile as it is being pushed out by the expanding gas. Modern small arms barrels are made of known and tested to withstand the pressures involved. Artillery pieces are made by various techniques providing reliably sufficient strength, early firearms were muzzle-loading, with powder, and then shot loaded from the muzzle, capable of only a low rate of fire. During the 19th century effective mechanical locks were invented that sealed a breech-loading weapon against the escape of propellant gases, the early Chinese, the inventors of gunpowder, used bamboo, a naturally tubular stalk, as the first barrels in gunpowder projectile weapons. Early European guns were made of iron, usually with several strengthening bands of the metal wrapped around circular wrought iron rings. The Chinese were the first to master cast-iron cannon barrels, early cannon barrels were very thick for their caliber. Bore evacuator Bore snake Cannon Muzzle Polygonal rifling Rifling Slug barrel Smoothbore
10.
Shell (projectile)
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A shell is a payload-carrying projectile that, as opposed to shot, contains an explosive or other filling, though modern usage sometimes includes large solid projectiles properly termed shot. Solid shot may contain a pyrotechnic compound if a tracer or spotting charge is used, originally, it was called a bombshell, but shell has come to be unambiguous in a military context. Words cognate with grenade are still used for an artillery or mortar projectile in some European languages, shells are usually large-calibre projectiles fired by artillery, combat vehicles, and warships. Shells usually have the shape of a cylinder topped by a nose for good aerodynamic performance, possibly with a tapering base. Solid cannonballs did not need a fuse, but hollow munitions filled with something such as gunpowder to fragment the ball, needed a fuse, percussion fuses with a spherical projectile presented a challenge because there was no way of ensuring that the impact mechanism hit the target. Therefore, shells needed a fuse that was ignited before or during firing. The earliest record of shells being used in combat was by the Republic of Venice at Jadra in 1376, shells with fuses were used at the 1421 siege of St Boniface in Corsica. These were two hollowed hemispheres of stone or bronze held together by an iron hoop, as described in their book, these hollow, gunpowder-packed shells were made of cast iron. At least since the 16th Century grenades made of ceramics or glass were in use in Central Europe, a hoard of several hundred ceramic greandes were discovered during building works in front of a bastion of the Bavarian City of Ingolstadt, Germany dated to the 17th Century. Lots of the grenades obtained their orignal blackpowder loads and igniters, most probably the grenades were intentionally dumped the moat of the bastion before the year 1723. Early powder burning fuses had to be loaded fuse down to be ignited by firing or a portfire put down the barrel to light the fuse, other shells were wrapped in bitumen cloth, which would ignite during the firing and in turn ignite a powder fuse. Nevertheless, shells came into use in the 16th Century. By the 18th Century, it was known that the fuse towards the muzzle could be lit by the flash through the windage between the shell and the barrel, the use of exploding shells from field artillery became relatively commonplace from early in the 19th century. Until the mid 19th century, shells remained as simple exploding spheres that used gunpowder and they were usually made of cast iron, but bronze, lead, brass and even glass shell casings were experimented with. The word bomb encompassed them at the time, as heard in the lyrics of The Star-Spangled Banner, typically, the thickness of the metal body was about a sixth of their diameter and they were about two thirds the weight of solid shot of the same calibre. To ensure that shells were loaded with their fuses towards the muzzle, in 1819, a committee of British artillery officers recognised that they were essential stores and in 1830 Britain standardised sabot thickness as a half inch. The sabot was also intended to reduce jamming during loading, despite the use of exploding shell, the use of smoothbore cannons, firing spherical projectiles of shot, remained the dominant artillery method until the 1850s. By the late 18th century, artillery could use canister shot to defend itself from infantry or cavalry attack and this involved loading a tin or canvas container filled with small iron or lead balls instead of the usual cannonball
11.
Caliber
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In guns, particularly firearms, caliber or calibre is the approximate internal diameter of the barrel, or the diameter of the projectile it fires, in hundredths or sometimes thousandths of an inch. For example, a 45 caliber firearm has a diameter of.45 of an inch. Barrel diameters can also be expressed using metric dimensions, as in 9mm pistol, when the barrel diameter is given in inches, the abbreviation cal can be used. Good performance requires a bullet to closely match the diameter of a barrel to ensure a good seal. While modern cartridges and cartridge firearms are referred to by the cartridge name. Firearm calibers outside the range of 17 to 50 exist, but are rarely encountered. Larger calibers, such as.577.585.600.700, the.950 JDJ is the only known cartridge beyond 79 caliber used in a rifle. Referring to artillery, caliber is used to describe the length as multiples of the bore diameter. A 5-inch 50 calibre gun has a diameter of 5 in. The main guns of the USS Missouri are 1650 caliber, makers of early cartridge arms had to invent methods of naming the cartridges, since no established convention existed then. One of the early established cartridge arms was the Spencer repeating rifle, later various derivatives were created using the same basic cartridge, but with smaller-diameter bullets, these were named by the cartridge diameter at the base and mouth. The original No.56 became the. 56-56, and the smaller versions. 56-52. 56-50, the. 56-52, the most common of the new calibers, used a 50-cal bullet. Optionally, the weight in grains was designated, e. g. 45-70-405. Variations on these methods persist today, with new cartridges such as the.204 Ruger, metric diameters for small arms refer to cartridge dimensions and are expressed with an × between the bore diameter and the length of the cartridge case, for example,7. 62×51 NATO. This indicates that the diameter is 7. 62mm, loaded in a case 51mm long. Similarly, the 6. 5×55 Swedish cartridge has a diameter of 6.5 mm. An exception to rule is the proprietary cartridge used by U. S. maker Lazzeroni. The following table lists commonly used calibers where both metric and imperial are used as equivalents
12.
Breech-loading weapon
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A breech-loading gun is a firearm in which the cartridge or shell is inserted or loaded into a chamber integral to the rear portion of a barrel. Modern mass production firearms are breech-loading, early firearms, on the other hand, were almost entirely muzzle-loading. In field artillery, breech loading allows the crew to reload the gun without exposing themselves to fire or repositioning the piece. The main challenge for developers of breech-loading firearms was sealing the breech and this was eventually solved for smaller firearms by the development of the self-contained metallic cartridge. For firearms too large to use cartridges, the problem was solved by the development of the interrupted screw, breech-loading swivel guns were invented in the 14th century. The breech-loading swivel gun had a rate of fire, and was especially effective in anti-personnel roles. Breech-loading firearms are known from the 16th century, Henry VIII possessed one, which he apparently used as a hunting gun to shoot birds. More breech-loading firearms were made in the early 18th century, one such gun known to have belonged to Philip V of Spain, and was manufactured circa 1715, probably in Madrid. It came with a ready-to load reusable cartridge, patrick Ferguson, a British Army officer, developed in 1772 the Ferguson rifle, a breech-loading flintlock firearm. Later on into the century there were attempts in Europe at an effective breech-loader. There were concentrated attempts at improved cartridges and methods of ignition, the cartridge was loaded through the breech and fired with a needle. The needle-activated central-fire breech-loading gun would become a feature of firearms thereafter. The corresponding firearm was also developed by Pauly, Pauly made an improved version, which was protected by a patent on 29 September 1812. In 1846 another Paris Frenchman, Benjamin Houllier, patented the first fully metallic cartridge containing powder in a metallic shell, Houllier commercialised his weapons in association with the gunsmiths Blanchard or Charles Robert. In English-speaking countries the Flobert cartridge corresponds to the.22 BB, the first centrefire cartridge was introduced in 1855 by Pottet, with both Berdan and Boxer priming. The Dreyse Zündnadelgewehr or Dreyse needle gun, was a single-shot breech-loading rifle using a rotating bolt to seal the breech and it was so called because of its. 5-inch needle-like firing pin, which passed through a paper cartridge case to impact a percussion cap at the bullet base. It began development in the 1830s under von Dreyse and eventually a version of it was adopted by Prussia in the late 1840s. The paper cartridge and the gun had numerous deficiencies, specifically, however, the rifle was used to great success in the Prussian army in the Austro-Prussian war of 1866
13.
Interrupted screw
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An interrupted screw or interrupted thread is a mechanical device typically used in the breech of artillery guns. It is believed to have invented in 1845. It is a screw that has a section of thread along its axis removed, the screw is mated with a partially threaded hole at the rear of the weapons chamber, where the screw has threads the hole has none, and vice versa. The screw can thus be smoothly inserted all the way into the gun, an earlier method was the use of a wedge to block the rear of the gun. Sealing was further improved with the de Bange obturator in 1872, the major weakness of the original designs was that only half of the circumference of the breechblock could be threaded, hence a fairly long breechblock was still required to achieve a secure lock. Axel Welin solved this problem with his stepped interrupted screw design and this design has threads of the block and breech cut in steps of successively larger radius. This is the design still in use with bagged charge artillery. Rifled breech loader Welin breech block Interrupted screw breech mechanisms Navweaps. com Interrupted threads used on naval guns
14.
Recoil
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Recoil is the backward movement of a gun when it is discharged. To apply this counter-recoiling force, modern mounted guns may employ recoil buffering comprising springs and hydraulic recoil mechanisms, early cannons used systems of ropes along with rolling or sliding friction to provide forces to slow the recoiling cannon to a stop. Recoil buffering allows the maximum counter-recoil force to be lowered so that strength limitations of the gun mount are not exceeded, however, the same pressures acting on the base of the projectile are acting on the rear face of the gun chamber, accelerating the gun rearward during firing. This results in the required counter-recoiling force being proportionally lower, modern cannons also employ muzzle brakes very effectively to redirect some of the propellant gasses rearward after projectile exit. This provides a force to the barrel, allowing the buffering system. The same physics affecting recoil in mounted guns and cannons applies to hand-held guns, hands, arms and shoulders have considerable strength and elasticity for this purpose, up to certain practical limits. For this reason, establishing recoil safety standards for small arms remains challenging, a change in momentum of a mass requires a force, according to Newtons first law, known as the law of inertia, inertia simply being another term for mass. That force, applied to a mass, creates an acceleration, according to Newtons second law, the law of momentum -- changing the velocity of the mass changes its momentum. It is important to understand at this point that velocity is not simply speed, velocity is the speed of a mass in a particular direction. In a very technical sense, speed is a scalar, a magnitude, in summation, the total momentum of the system equals zero, surprisingly just as it did before the trigger was pulled. There are two conservation laws at work when a gun is fired, conservation of momentum and conservation of energy, recoil is explained by the law of conservation of momentum, and so it is easier to discuss it separately from energy. The nature of the process is determined by the force of the expanding gases in the barrel upon the gun. It is also determined by the force applied to the gun. The recoil force only acts during the time that the ejecta are still in the barrel of the gun, except for the case of zero-recoil, the counter-recoil force is smaller than the recoil force but lasts for a longer time. Since the recoil force and the force are not matched. In the zero-recoil case, the two forces are matched and the gun will not move when fired. In most cases, a gun is very close to a free-recoil condition, an example of near zero-recoil would be a gun securely clamped to a massive or well-anchored table, or supported from behind by a massive wall. For example, placing the butt of a large caliber gun directly against a wall, the recoil of a firearm, whether large or small, is a result of the law of conservation of momentum
15.
Gun carriage
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A gun carriage is a frame and mount that supports the gun barrel of an artillery piece, allowing it to be manoeuvred and fired. The earliest guns were laid directly onto the ground, with earth being piled up under the end of the barrel to increase the elevation. As the size of guns increased, they began to be attached to wooden frames or beds that were held down by stakes. These began to be replaced by wheeled carriages in the early 16th century, from the 16th to the mid-19th century, the main form of artillery remained the smoothbore cannon. By this time, the trunnion had been developed, with the result that the barrel could be held in two recesses in the carriage and secured with an iron band. This simplified elevation, which was achieved by raising or lowering the breech of the gun by means of a wedge called a quoin or later by a steel screw. During this time, the design of gun carriages evolved only slowly, the trunnions of the gun barrel sat on the top of the cheeks, the rearward part of each cheek was stepped so that the breech could be lifted by iron levers called handspikes. Traversing the gun was achieved by levering the rear of the carriage sideways with handspikes and these were designed to allow guns to be deployed on the battlefield and were provided with a pair of large wheels similar to those used on carts or wagons. The cheeks of field carriages were much narrower than those on the naval carriage, when the gun needed to be moved any distance, the trail could be lifted onto a second separate axle called a limber, which could then be towed by a team of horses or oxen. Limbers had been invented in France in about 1550, in recent times, most heavy guns in military service, that were not themselves mounted into a vehicles, have been mounted either with a field carriage or a split trail carriage. The field carriage is simpler - having two legs extend backwards, joining at a tail, being a hardpoint to hook on to a prime mover or set of horses, the split trail carriage, however, is more complicated, but offers distinct advantages. It consists of two legs, able to be spread independently to the sides, or brought together to allow towing or movement, in both cases, the tail of the carriage often serves to balance the gun, and protect it from rolling to any large extent. The split trail, however, allows the gun not only to be fired near the horizontal, as the field carriage does and this is less important for heavier artillery, as the guns already involve a long time to prepare a firing position. While this still limits the ability to track, it allows the guns to fire in any direction with minimal preparation. Furthermore, it part of each of the benefits of the field carriage, being weight, space. The practice has its origins in war and appears in the century in the Queens regulations of the British Army. In the United Kingdom, the visual distinction usually referred to is that in a state funeral and this distinguishing feature is not invariable, however, as shown by the use of naval ratings rather than horses at the ceremonial funeral for Lord Mountbatten in 1979
16.
Gun laying
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Gun laying is the process of aiming an artillery piece, such as a gun, howitzer or mortar on land, or at sea, against surface or air targets. It may be laying for direct fire, where the gun is aimed similarly to a rifle, or indirect fire, the term includes automated aiming using, for example, radar-derived target data and computer-controlled guns. Gun laying means moving the axis of the bore of the barrel in two planes, horizontal and vertical. A gun is traversed – rotated in a horizontal plane – to align it with the target, Gun laying is a set of actions to align the axis of a gun barrel so that it points in the required direction. This alignment is in the horizontal and vertical planes, Gun laying may be for direct fire, where the layer sees the target, or indirect fire, where the target may not be visible from the gun. Gun laying has sometimes called training the gun. Laying in the vertical plane uses data derived from trials or empirical experience, for any given gun and projectile types, it reflects the distance to the target and the size of the propellant charge. It also incorporates any differences in height between gun and target, with indirect fire, it may allow for other variables as well. With indirect fire the horizontal angle is relative to something, typically the guns aiming point, depending on the gun mount, there is usually a choice of two trajectories. The dividing angle between the trajectories is about 45 degrees, it varies due to gun dependent factors. Below 45 degrees the trajectory is called low angle, above is high angle, the differences are that low angle fire has a shorter time of flight, a lower vertex and flatter angle of descent. All guns have carriages or mountings that support the barrel assembly, early guns could only be traversed by moving their entire carriage or mounting, and this lasted with heavy artillery into World War II. Mountings could be fitted into traversing turrets on ships, coast defences or tanks, from circa 1900 field artillery carriages provided traverse without moving the wheels and trail. The carriage, or mounting, also enabled the barrel to be set at the elevation angle. With some gun mounts it is possible to depress the gun, some guns require a near-horizontal elevation for loading. An essential capability for any elevation mechanism is to prevent the weight of the barrel forcing its heavier end downward and this is greatly helped by having trunnions at the centre of gravity, although a counterbalance mechanism can be used. It also means the elevation gear has to be enough to resist considerable downward pressure. However, mortars, where the forces were transferred directly into the ground
17.
United States Army
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The United States Armed Forces are the federal armed forces of the United States. They consist of the Army, Marine Corps, Navy, Air Force, from the time of its inception, the military played a decisive role in the history of the United States. A sense of unity and identity was forged as a result of victory in the First Barbary War. Even so, the Founders were suspicious of a permanent military force and it played an important role in the American Civil War, where leading generals on both sides were picked from members of the United States military. Not until the outbreak of World War II did a standing army become officially established. The National Security Act of 1947, adopted following World War II and during the Cold Wars onset, the U. S. military is one of the largest militaries in terms of number of personnel. It draws its personnel from a pool of paid volunteers. As of 2016, the United States spends about $580.3 billion annually to fund its military forces, put together, the United States constitutes roughly 40 percent of the worlds military expenditures. For the period 2010–14, the Stockholm International Peace Research Institute found that the United States was the worlds largest exporter of major arms, the United States was also the worlds eighth largest importer of major weapons for the same period. The history of the U. S. military dates to 1775 and these forces demobilized in 1784 after the Treaty of Paris ended the War for Independence. All three services trace their origins to the founding of the Continental Army, the Continental Navy, the United States President is the U. S. militarys commander-in-chief. Rising tensions at various times with Britain and France and the ensuing Quasi-War and War of 1812 quickened the development of the U. S. Navy, the reserve branches formed a military strategic reserve during the Cold War, to be called into service in case of war. Time magazines Mark Thompson has suggested that with the War on Terror, Command over the armed forces is established in the United States Constitution. The sole power of command is vested in the President by Article II as Commander-in-Chief, the Constitution also allows for the creation of executive Departments headed principal officers whose opinion the President can require. This allowance in the Constitution formed the basis for creation of the Department of Defense in 1947 by the National Security Act, the Defense Department is headed by the Secretary of Defense, who is a civilian and member of the Cabinet. The Defense Secretary is second in the chain of command, just below the President. Together, the President and the Secretary of Defense comprise the National Command Authority, to coordinate military strategy with political affairs, the President has a National Security Council headed by the National Security Advisor. The collective body has only power to the President
18.
M198 howitzer
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The M198 howitzer is a medium-sized, towed 155mm artillery piece, developed for service with the United States Army and Marine Corps. It was commissioned to be a replacement for the WWII-era M114155 mm howitzer and it was designed and prototyped at the Rock Island Arsenal in 1969 with firing tests beginning in 1970 and went into full production there in 1978. It entered service in 1979 and since then 1,600 units have been produced, the M198 is being replaced in US and Australian service by the M777 howitzer. The M198155 mm howitzer weighs less than 16,000 pounds, the M198 is a towed howitzer that is transported tail first. The gun tube can be rotated over the trail legs to reduce its length, though this requires removal of the muzzle brake. When firing, the weapon is lowered onto its baseplate rather than being anchored to the ground, the breech is operated manually via a screw type mechanism that rests low in an ergonomic position. The M198 fires non-fixed ammunition and can be loaded with a variety of propellants, the effective range is 18,100 meters when firing standard projectiles, which increases to 30,000 meters when firing rocket-assisted projectiles and guided ammunition. With the 52-caliber modification the range can surpass 40,000 meters, the weapon system requires a crew of 9 and is capable of firing at a maximum rate of four rounds per minute, two sustained. The M198 is deployed in separate corps- and army-level field artillery units, as well as in artillery battalions of light and it also provides field artillery fire support for all Marine Air-Ground Task Force organizations. High Explosive, Explosive Composition B material packed into a thick, internally scored shell which causes a large blast, the kill zone is approximately a radius of 50 meters and casualty radius is 100 meters. The Marine Corps and US Army also uses the M795 High Explosive round, rocket Assisted Projectile A rocket-assisted HE M549 round that adds to the maximum range of the normal HE. For the 155 mm RAP round, max range is 30.1 kilometres, white Phosphorus A base-ejecting projectile which can come in two versions, felt-wedge and standard. White phosphorus smoke is used to fires, burn a target. Illumination Illumination projectiles are base-ejecting rounds which deploy a parachute flare ideally 600 meters above the ground. Illumination rounds are used in conjunction with HE rounds, to illuminate the target area so that HE rounds can be fired more effectively. Illumination rounds can also be used during the daytime to mark targets for aircraft, the M485 Illumination round burns for 120 seconds. Dual-Purpose Improved Conventional Munition A base-ejecting projectile that drops 88 bomblets above a target, each bomblet has a shaped-charge munition capable of penetrating two inches of solid steel as well as a fragmentation casing which is effective against infantry in the open. The DPICM round is effective against armored vehicles, even tanks, area Denial Artillery Munition System An artillery round that releases anti-personnel mines
19.
World War I
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World War I, also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. More than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history and it was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved. The war drew in all the worlds great powers, assembled in two opposing alliances, the Allies versus the Central Powers of Germany and Austria-Hungary. These alliances were reorganised and expanded as more nations entered the war, Italy, Japan, the trigger for the war was the assassination of Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary, by Yugoslav nationalist Gavrilo Princip in Sarajevo on 28 June 1914. This set off a crisis when Austria-Hungary delivered an ultimatum to the Kingdom of Serbia. Within weeks, the powers were at war and the conflict soon spread around the world. On 25 July Russia began mobilisation and on 28 July, the Austro-Hungarians declared war on Serbia, Germany presented an ultimatum to Russia to demobilise, and when this was refused, declared war on Russia on 1 August. Germany then invaded neutral Belgium and Luxembourg before moving towards France, after the German march on Paris was halted, what became known as the Western Front settled into a battle of attrition, with a trench line that changed little until 1917. On the Eastern Front, the Russian army was successful against the Austro-Hungarians, in November 1914, the Ottoman Empire joined the Central Powers, opening fronts in the Caucasus, Mesopotamia and the Sinai. In 1915, Italy joined the Allies and Bulgaria joined the Central Powers, Romania joined the Allies in 1916, after a stunning German offensive along the Western Front in the spring of 1918, the Allies rallied and drove back the Germans in a series of successful offensives. By the end of the war or soon after, the German Empire, Russian Empire, Austro-Hungarian Empire, national borders were redrawn, with several independent nations restored or created, and Germanys colonies were parceled out among the victors. During the Paris Peace Conference of 1919, the Big Four imposed their terms in a series of treaties, the League of Nations was formed with the aim of preventing any repetition of such a conflict. This effort failed, and economic depression, renewed nationalism, weakened successor states, and feelings of humiliation eventually contributed to World War II. From the time of its start until the approach of World War II, at the time, it was also sometimes called the war to end war or the war to end all wars due to its then-unparalleled scale and devastation. In Canada, Macleans magazine in October 1914 wrote, Some wars name themselves, during the interwar period, the war was most often called the World War and the Great War in English-speaking countries. Will become the first world war in the sense of the word. These began in 1815, with the Holy Alliance between Prussia, Russia, and Austria, when Germany was united in 1871, Prussia became part of the new German nation. Soon after, in October 1873, German Chancellor Otto von Bismarck negotiated the League of the Three Emperors between the monarchs of Austria-Hungary, Russia and Germany
20.
4.5-inch Gun M1
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The 4.5 inch Gun M1 was a field gun developed in the United States in the beginning of World War II. It shared the same carriage with the 155mm Howitzer M1 and fired the same ammunition as the British BL4.5 inch Medium Field Gun. The weapon was used by the US Army in Northwest Europe late in the war for corps support, in 1920 the US Army Ordnance started to work on a new medium field gun. Since the US Army had already employed the 4.7 inch Gun M1906 during World War I, the development resulted in 4.7 inch Gun M1922E on Carriage M1921E. Due to lack of funding, the design never reached production, in 1939 the program was restarted, the renewed design, designated 4.7 inch Gun T3, was ready by early 1940, it utilized the same carriage as the concurrently developed 155 mm howitzer. At this stage, the decided to change the weapon to use the British 4.5 inch ammunition. The modified gun was standardized in April 1941 as 4.5 inch Gun M1 on Carriage M1, the production started in September 1942 and continued until February 1944. The M1 was very similar in construction and appearance to the 155mm Howitzer M1, the only significant difference was its tube of 4.5 inch caliber. The tube had uniform right hand twist, with one turn in 32 calibers, the unbalanced weight of the barrel was supported by two equilibrator springs. The breach was of interrupted screw type, the recoil system hydropneumatic, the carriage was of split trail type, unsprung and had wheels with pneumatic tires. In firing position, the weapon was supported by a retractable pedestal, the gun was equipped with M12 panoramic sight. The M1 equipped 16 or 17 field artillery battalions in the Northwest Europe, M5 High Speed Tractor was assigned as prime mover. The weapon was declared obsolete in September 1945, the gun had good range, nearly five km longer than its 155 mm howitzer sibling and longer than the 155 mm Gun M1918MI. It was out-ranged by another 155 mm gun, the Long Tom, on the other side, the 4.5 inch gun was criticized for insufficient power of its high-explosive shell. The shell was produced from low grade steel, which necessitated thick walls, as a result, it carried only about two kg of TNT or substitute, in fact less than the 105 mm high-explosive shell. Additionally, it was felt that having a number of guns of atypical caliber unnecessarily complicated logistics. 4.7 inch Gun M1920 on Carriage M1920,4.7 inch Gun M1922E on Carriage M1921E. 4.5 inch Gun M1 on Carriage M1, the weapon was experimentally mounted on a lengthened chassis of the M5 light tank, in mount M1
21.
Victory over Japan Day
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Victory over Japan Day is the day on which the Empire of Japan surrendered in World War II, in effect ending the war. August 15 is the official V-J Day for the UK, while the official U. S. commemoration is September 2, the name, V-J Day, had been selected by the Allies after they named V-E Day for the victory in Europe. On September 2,1945, a surrender ceremony was performed in Tokyo Bay, Japan. In Japan, August 15 usually is known as the day for the end of the war. This official name was adopted in 1982 by an issued by the Japanese government. On 6 and 9 August 1945, the United States dropped atomic bombs on Hiroshima, on August 9, the Soviet Union declared war on Japan. The Japanese government on August 10 communicated its intention to surrender under the terms of the Potsdam Declaration, the news of the Japanese offer, however, was enough to begin early celebrations around the world. Allied soldiers in London danced in a line on Regent Street. Americans and Frenchmen in Paris paraded on the Champs-Elysées singing Dont Fence Me In, American soldiers in Berlin shouted Its over in the Pacific, and hoped that they would now not be transferred there to fight the Japanese. Germans stated that the Japanese were wise enough to—unlike themselves—give up in a hopeless situation, moscow newspapers briefly reported on the atomic bombings with no commentary of any kind. While Russians and foreigners alike could hardly talk about anything else, in Chungking, Chinese fired firecrackers and almost buried in gratitude. In Manila, residents sang God Bless America, on Tinian island, B-29 crews preparing for their next mission over Japan were told that it was cancelled, but that they could not celebrate because it might be rescheduled. S. President Harry S Truman via the Swiss diplomatic mission in Washington, a nationwide broadcast by Truman was aired at seven oclock p. m. on August 14 announcing the communication and that the formal event was scheduled for September 2. In his announcement of Japans surrender on August 14, Truman said that the proclamation of V-J Day must wait upon the signing of the surrender terms by Japan. In Australia, the name V-P Day was used from the outset, the Canberra Times of August 14,1945, refers to VP Day celebrations, and a public holiday for VP Day was gazetted by the government in that year according to the Australian War Memorial. In Washington, D. C. a crowd attempted to break into the White House grounds as they shouted We want Harry, in San Francisco two women jumped naked into a pond at the Civic Center to soldiers cheers. The largest crowd in the history of New York Citys Times Square gathered to celebrate. S, in the Garment District, workers threw out cloth scraps and ticker tape, leaving a pile five inches deep on the streets. A coast-to-coast frenzy of kissing occurred, with Life publishing photographs of such kisses in Washington, Kansas City, Los Angeles, one of the best-known kisses that day appeared in V-J Day in Times Square, one of the most famous photographs ever published by Life
22.
M101 howitzer
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The 105 mm M2A1 howitzer was a howitzer developed and used by the United States. It was the standard U. S. light field howitzer in World War II, entering production in 1941, it quickly gained a reputation for accuracy and a powerful punch. The M101A1 fired 105-millimetre high explosive semi-fixed ammunition and had a range of 11,270 metres, all of these qualities of the weapon, along with its widespread production, led to its adoption by many countries after the war. Its ammunition type also became the standard for foreign countries later models. During the Second World War, U. S. artillery regiments consisted of an HQ detachment, one 155mm artillery battalion, both the 155mm and 105mm battalions had twelve guns each, divided into three batteries of four guns. That gave each regiment a total of twelve 155mm howitzers, with an HE M1 shell fired at 9000 meters, the probable error in range was 41 meters, while the probable error in line was 10 meters. The U. S. military artillery designation system was changed in 1962, the gun continued to see service in the Korean and Vietnam Wars. Though a similar model, the M102 howitzer, shared the roles in battle. Today, the M101A1 has been retired by the U. S. military, though it continues to see service with many other countries. By the end of the Second World War,8,536 105mm towed howitzers had been built and post-war production continued at Rock Island Arsenal until 1953, by which time 10,202 had been built. The Canadian Forces continued to use the M2A1 as the C2 Howitzer until 1997, the changes include a longer barrel, a muzzle brake, reinforced trails and the removal of shield flaps. It remains the standard light howitzer of Canadian Forces Reserve units, the C3 is used by Reserve units in Glacier National Park in British Columbia as a means of avalanche control. In addition, the M101 has found a use in the U. S. as an avalanche control gun. Today upgraded M2A1 howitzers are still being used by the Peoples Army of Vietnam and it continues to remain as the primary tactical field-howitzer of the VPA. M2 Howitzers are still in limited service in the Australian Army Reserve, in regular service they were replaced by the 105mm L119 Hamel gun and the 155-millimetre M198 howitzers. Two M2 howitzers are employed in providing the gun salute at Kristiansten Fortress, in Trondheim. M101/M2 is one of three approved salute guns in the Norwegian armed forces, and have reduced to a caliber of 75 millimetres for this purpose. They are used for gun salute also at Rena and Setermoen, M2 - minor changes to the chamber to allow use of fixed ammunition
23.
M3 Stuart
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The M3 Stuart, formally Light Tank M3, is an American light tank of World War II. It was supplied to British and Commonwealth forces under lend-lease prior to the entry of the U. S. into the war, thereafter, it was used by U. S. and Allied forces until the end of the war. The name General Stuart or Stuart given by the British comes from the American Civil War Confederate General J. E. B, Stuart and was used for both the M3 and the derivative M5 Light Tank. In British service, it also had the nickname of Honey after a tank driver remarked Shes a honey. To the United States Army, the tanks were known only as Light Tank M3. Stuarts were the first American-crewed tanks in World War II to engage the enemy in tank versus tank combat, observing events in Europe, American tank designers realized that the Light Tank M2 was becoming obsolete and set about improving it. The upgraded design, with armor, modified suspension and new gun recoil system was called Light Tank M3. Production of the started in March 1941 and continued until October 1943. Later, the gun was replaced with the slightly longer M6, for a light tank, the Stuart was fairly heavily armored. Internally, the engine was at the rear and the transmission at the front. The prop shaft connecting the two ran through the middle of the fighting compartment, the radial engine, having its crankshaft high off the hull bottom, contributed to the tanks high silhouette. When a revolving turret floor was introduced in the M3 hybrid and M3A1, in contrast to the M2A4, all M3/M5 series tanks had a trailing rear idler wheel for increased ground contact). This variation was quieter, cooler and roomier, owing to its automatic transmission, it also simplified crew training. The new model featured a redesigned hull with sloped glacis plate. Although the main criticism from the using it was that the Stuarts lacked firepower. The M5 gradually replaced the M3 in production from 1942 and, the British Army was the first to use the Light Tank M3 as the General Stuart in combat. From mid-November 1941 to the end of the year, about 170 Stuarts took part in Operation Crusader during the North Africa Campaign and this is despite the fact that the M3 was superior or comparable in most regards to most of the tanks used by the Axis forces. The most numerous German tank, the Panzer III Ausf G, had nearly identical armor and speed to the M3, mentioned in the British complaints were the 37 mm M5 gun and poor internal layout
24.
M24 Chaffee
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In British service it was given the service name Chaffee after the United States Army General Adna R. Chaffee, Jr. who helped develop the use of tanks in the United States armed forces. While long removed from American and British service, it is found in service as a light tank in third-world countries. British combat experience in the North African campaign identified several shortcomings of the M3 Stuart light tank, the M3/M5 design was dated though, the 75 mm gun reduced storage space, and the armor was insufficient. The weight increase without increased power gave it unsatisfactory performance, the program was stopped in March 1943 to allow standardization on a medium tank - the M4 medium. The powerplant and transmission of the M5 were used together with some aspects of the T7, every effort was made to keep the weight of the vehicle under 20 tons. The armor was light, with the glacis plate only 25 mm thick. A new lightweight 75 mm gun was developed, a derivative of the gun used in the B-25H Mitchell bomber, the gun had the same ballistics as the 75 mm M3 in use by American tanks but used a thinly walled barrel and different recoil mechanism. The design featured -16 in - tracks and torsion bar suspension, the torsion bar system was to give a smoother ride than the vertical volute suspension used on most US armored vehicles. At the same time, the chassis was expected to be a used for other vehicles, such as self-propelled guns. It had a low silhouette and a three-man turret. On October 15,1943, the first pilot vehicle was delivered, the design was judged a success and a contract for 1,000 was immediately raised by the Ordnance Department. This was subsequently increased to 5,000, production began in 1944 under the designation Light Tank M24. It was produced at two sites, from April at Cadillac and from July at Massey-Harris, by the time production was stopped in August 1945,4,731 M24s had been produced. The M24 Chaffee was intended to replace the aging and obsolete Light Tank M5, the first thirty-four M24s reached Europe in November 1944 and were issued to the U. S. 2nd Cavalry Group in France. These were then issued to Troop F, 2nd Cavalry Reconnaissance Squadron and Troop F, 42nd Cavalry Reconnaissance Squadron, which each received seventeen M24s. During the Battle of the Bulge in December 1944, these units and their new tanks were rushed to the southern sector, the M24 started to enter widespread use in December 1944, but they were slow in reaching the front-line combat units. By the end of the war, many armored divisions were mainly equipped with the M3/M5 Stuart. Some armored divisions did not receive their first M24s until the war was over, reports from the armored divisions that received them prior to the end of hostilities were generally positive
25.
M41 Howitzer Motor Carriage
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The 155 mm Howitzer Motor Carriage M41 was an American self-propelled artillery vehicle built on a lengthened M24 Chaffee tank chassis that was introduced at the end of the Second World War. Out of a run of 250, only 85 were produced before cancellation of the order at the end of 1945. The M41 went on to serve extensively in the Korean War, the type was retired after the conclusion of that conflict, but went on to serve briefly in the French Army. In December 1942, work began on a 155mm self-propelled howitzer based on the newly introduced M1 155mm howitzer and this resulted in the production of a single prototype designated the T64. Equipped with a M1 155mm howitzer with a heavy recoil-absorption spade at the back, the howitzer had limited side-to-side traverse and up to 45 degrees vertical traverse, and a total of 22 rounds could be stored in the vehicle. Additional ammunition was carried by M39 Armored Utility Vehicles, the hull had only 13 mm of armor all around, sufficient to protect only against small arms, while the shielding around the gun compartment was only 6.5 mm thick. After the T64E1 underwent trials at the Aberdeen Proving Ground in December,1944, minor modifications were made, the type was re-designated the M41 in June,1945. However, the M41 arrived too late to see action in World War II, and these M41s served in the peacetime army, where they received the appellation Gorilla, and went on to serve in the Korean War before being retired. Some M41s were also passed on to the French Army, M41s were used in action in the Korean War, where they were useful in providing support during the early mobile phase of the conflict. Once the war ground down to static engagements, the M41s employed their mobility to evade counter-battery fire, the 92nd Field Artillery Battalion and the 999th Armored Field Artillery Battalion were among units that employed M41s in Korea. During the battle, Battery B was forced to evacuate its position after neighboring units withdrew, during the evacuation, it was ambushed by Chinese forces and consequently suffered seven crew killed and 31 wounded, with a loss of 2 M39s, and 2 M41s damaged. However, the unit soon routed the ambush, inflicting an estimated 100 casualties on the ambushing forces, the Chinese Peoples Liberation Army captured two M41s during the Korean War, employing them against U. S. forces in the Battle of Maryang San. One of them can be seen on display at the Military Museum of the Chinese Peoples Revolution in Beijing, compared to the contemporary 155mm M40 Gun Motor Carriage, the M41 was lighter and faster, but had inferior range. S. Army to develop new self-propelled artillery in the 1960s, such as the M109 Paladin, T64, Prototype based on M5A1 Stuart chassis. T64E1, Definitive prototype based on lengthened M24 Chaffee chassis
26.
M44 self propelled howitzer
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The M44 was an American-made self-propelled 155 mm howitzer based on the M41 Walker Bulldog tank chassis, first introduced in the early 1950s. Flaws in its design prevented it from seeing action in the Korean War, italian and British Armies into the 1960s, and even longer under the Turkish service. Unlike the M41 and the earlier M12 Gun Motor Carriage, the M44 was to have an enclosed gun compartment, the initial prototype was designated the T99E1, but production began before testing was complete. Engineers offered a design called the T194E1 with a modified howitzer and open crew compartment that successfully vented the fumes. The already produced vehicles were upgraded to the new standard, and deployed to front line units in 1954, too late to see action in the Korean War, the M44 fleet was later upgraded with AOS-895-6 engines, and thus designated the M44A1. The M44 served on until 1963 when it was replaced by the M109, the M44 was exported to Italy, the UK and Turkey. In 1956, the United Kingdom received 58 M44s through the Mutual Defense Assistance Program,52 were deployed to the British Army of the Rhine in the 1st Royal Horse Artillery and 4th Royal Horse Artillery, while the remaining six were sent to England. The M44 was considered an improvement over the World War II vintage Sexton self-propelled howitzers. As newer weapons became available, the M44s were passed on to different units, in 1986,222 Turkish Army M44s were extensively upgraded with 36 caliber 155mm howitzers by Rheinmetall with an increased range of 24.7 km. An MTU MB833 Aa-501 V-6 water-cooled diesel developing 450 hp at 2,300 rpm coupled to the original Allison CD-500-3 transmission via a ZF gearbox was fitted, there were numerous other improvements such as upgraded suspension, tracks and fire control and increased fuel capacity. The drivers position was moved into the hull, the last was delivered in 1992. Turkey,222 upgraded to M44T variant by Rheinmetall between 1986-1992, at least 39 surviving M44s have been identified in North America and Europe, not including any still in Turkish service. M44 Self Propelled Howitzers in Action 1950s documentary Surviving M44 Self-Propelled Howitzers
27.
Fort Sill
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Fort Sill, Oklahoma is a United States Army post north of Lawton, Oklahoma, about 85 miles southwest of Oklahoma City. Today, Fort Sill remains the only active Army installation of all the forts on the Southern Plains built during the Indian Wars, Fort Sill is also one of the four locations for Army Basic Combat Training. It has played a significant role in every major American conflict since 1869, sheridans massive winter campaign involved six cavalry regiments accompanied by frontier scouts such as Buffalo Bill Cody, Wild Bill Hickok, Ben Clark and Jack Stilwell. At first, the garrison was called Camp Wichita and was referred to by the Indians as the Soldier House at Medicine Bluffs. Sheridan later named it in honor of his West Point classmate and friend, Brigadier General Joshua W. Sill, the first post commander was Brevet Maj. Gen. Benjamin Grierson and the first Indian agent was Colonel Albert Gallatin Boone, grandson of Daniel Boone. Fort Sill soldiers were restricted from taking action against the Indians. The Indians resumed raiding the Texas frontier and used Fort Sill as a sanctuary, in 1871, General of the Army William Tecumseh Sherman arrived at Fort Sill from Fort Richardson, Texas, while on a tour of Army posts throughout the country. Sherman was at Fort Richardson when they became aware of the Warren Wagon Train Raid, soon after Sherman arrived at Fort Sill, the Indian Agent brought several Kiowa chiefs to tell their story about attacking the wagon train. When Sherman ordered their arrest during a meeting on Griersons porch, in memory of the event, the Commanding Generals quarters were dubbed Sherman House. The Army arrested three chiefs during the skirmish, Satank, Satanta and Addo-etta. Sherman ordered them to Texas for a trial for the murders. When the three were put into a wagon and taken under escort to Fort Richardson, Satank began his death song. A mile down the trail, he grabbed the carbine of one of the troopers in the wagon, before he could cock and fire it, he was hit by several shots fired by the escort. Satank was left against a tree and the continued on its mission. A marker on Berry Road near the curve marks the spot where Satank and his grave is in Chiefs Knoll in the post cemetery. Satanta and Addo-etta were tried by Texas courts on 5 and 6 July and they were sentenced to death by hanging. Supporters of the Quaker peace policy convinced Governor Edmund J. Davis to commute the Indians sentences to life imprisonment, then in October 1873 they were paroled. In June 1874, the Comanches, Kiowas and Southern Cheyennes engaged in the Red River War, lasting a year, it was a war of attrition involving relentless pursuit by converging military columns
28.
Oklahoma
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Oklahoma is a state located in the South Central United States. Oklahoma is the 20th-most extensive and the 28th-most populous of the 50 United States, the states name is derived from the Choctaw words okla and humma, meaning red people. The name was settled upon statehood, Oklahoma Territory and Indian Territory were merged, on November 16,1907, Oklahoma became the 46th state to enter the union. Its residents are known as Oklahomans, or informally Okies, and its capital, a major producer of natural gas, oil, and agricultural products, Oklahoma relies on an economic base of aviation, energy, telecommunications, and biotechnology. In 2007, it had one of the economies in the United States, ranking among the top states in per capita income growth. Oklahoma City and Tulsa serve as Oklahomas primary economic anchors, with nearly two-thirds of Oklahomans living within their metropolitan statistical areas. With small mountain ranges, prairie, mesas, and eastern forests, most of Oklahoma lies in the Great Plains, Cross Timbers, interior Highlands—a region especially prone to severe weather. The name Oklahoma comes from the Choctaw phrase okla humma, literally meaning red people, equivalent to the English word Indian, okla humma was a phrase in the Choctaw language used to describe Native American people as a whole. Oklahoma later became the de facto name for Oklahoma Territory, and it was approved in 1890. Oklahoma is the 20th-largest state in the United States, covering an area of 69,898 square miles and it is one of six states on the Frontier Strip and lies partly in the Great Plains near the geographical center of the 48 contiguous states. It is bounded on the east by Arkansas and Missouri, on the north by Kansas, on the northwest by Colorado, on the far west by New Mexico, much of its border with Texas lies along the Southern Oklahoma Aulacogen, a failed continental rift. The geologic figure defines the placement of the Red River, the Oklahoma panhandles Western edge is out of alignment with its Texas border. The Oklahoma/New Mexico border is actually 2.1 to 2.2 miles east of the Texas line, the border between Texas and New Mexico was set first as a result of a survey by Spain in 1819. It was then set along the 103rd Meridian, in the 1890s, when Oklahoma was formally surveyed using more accurate surveying equipment and techniques, it was discovered the Texas line was not set along the 103rd Meridian. Surveying techniques were not as accurate in 1819, and the actual 103rd Meridian was approximately 2.2 miles to the east and it was much easier to leave the mistake than for Texas to cede land to New Mexico to correct the surveying error. The placement of the Oklahoma/New Mexico border represents the true 103rd Meridian, cimarron County in Oklahomas panhandle is the only county in the United States that touches four other states, New Mexico, Texas, Colorado and Kansas. Its highest and lowest points follow this trend, with its highest peak, Black Mesa, at 4,973 feet above sea level, situated near its far northwest corner in the Oklahoma Panhandle. The states lowest point is on the Little River near its far southeastern boundary near the town of Idabel, Oklahoma, which dips to 289 feet above sea level
29.
TNT
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Trinitrotoluene, or more specifically 2,4, 6-trinitrotoluene, is a chemical compound with the formula C6H23CH3. This yellow-colored solid is used as a reagent in chemical synthesis. The explosive yield of TNT is considered to be the measure of bombs. In chemistry, TNT is used to charge transfer salts. TNT was first prepared in 1863 by German chemist Julius Wilbrand and its potential as an explosive was not appreciated for several years, mainly because it was so difficult to detonate and because it was less powerful than alternatives. Its explosive properties were first discovered by another German chemist, Carl Häussermann, the German armed forces adopted it as a filling for artillery shells in 1902. The British started replacing lyddite with TNT in 1907, TNT is still widely used by the United States military, as well as construction companies around the world. The majority of TNT currently used by the US military is manufactured by Radford Army Ammunition Plant near Radford, in industry, TNT is produced in a three-step process. First, toluene is nitrated with a mixture of sulfuric and nitric acid to produce mononitrotoluene, the MNT is separated and then renitrated to dinitrotoluene. In the final step, the DNT is nitrated to trinitrotoluene using a mixture of nitric acid. Nitric acid is consumed by the process, but the diluted sulfuric acid can be reconcentrated and reused. The rinse water from sulphitation is known as red water and is a significant pollutant, control of nitrogen oxides in feed nitric acid is very important because free nitrogen dioxide can result in oxidation of the methyl group of toluene. This reaction is exothermic and carries with it the risk of a runaway reaction leading to an explosion. In the laboratory,2,4, 6-trinitrotoluene is produced by a two-step process, a nitrating mixture of concentrated nitric and sulfuric acids is used to nitrate toluene to a mixture of mono- and di-nitrotoluene isomers, with careful cooling to maintain temperature. The nitrated toluenes are then separated, washed with dilute sodium bicarbonate to remove oxides of nitrogen, towards the end of the nitration, the mixture is heated on a steam bath. The trinitrotoluene is separated, washed with a solution of sodium sulfite. TNT is one of the most commonly used explosives for military, industrial, TNT has been used in conjunction with hydraulic fracturing, a process used to recover oil and gas from shale formations. The technique involves displacing and detonating nitroglycerin in hydraulically induced fractures followed by wellbore shots using pelletized TNT, TNT is valued partly because of its insensitivity to shock and friction, with reduced risk of accidental detonation compared to more sensitive explosives such as nitroglycerin
30.
M107 projectile
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The M107 155mm projectile was the standard 155mm high explosive projectile for howitzers of the US Army and US Marine Corps. A bursting round with fragmentation and blast effects, the M107 is being superseded in the US military by the M795, the M107 is a development of the M102155 mm shell that was developed in the 1930s from the French Schneider 155 mm projectile for the Model 1917 Howitzer. The M107 differs from the M102 mainly in having a driving band. The body consists of a steel shell containing high explosive painted olive drab with yellow markings. A fuze adapter is screwed into the body and brazed in place, an eyebolt lifting plug is screwed into the fuze well to assist in transportation. The plug is removed and replaced with a fuze for firing, the complete projectile weighs 43.2 kg, is 800 mm long and contains 15. 8% explosive by weight. It is a separate-loading projectile—propellant bags or MAC charges are loaded separately, on detonation it produces approximately 1,950 fragments. The M107 was approved for use in 1958 and issued to the army from 1959 and its intended replacement is the M795, manufacture of which began in 1999. The M114 howitzer can fire an M107 up to 14.5 km using M4A2 White Bag propellant, modified M107 rounds with base bleed and new aerodynamics can extend this range to around 32 km. Its limited effectiveness also make it an option in peace support operations. M107 is manufactured by several nations, sometimes with variations in the fill and or filling method, or other details, for example those produced to UK requirements are designated L21, not M107, German examples were designated DM21. By the 1970s M107 was a design, and some European armies started replacing their war stocks with modern designs such as L15. However M107 was retained for training purposes, because it was cheap and being less lethal had a smaller peacetime safety area, an important consideration given the small European training areas. Weight as fired,41.86 kilograms Explosive content, TNT5.74 kilograms Length,605.3 mm Body diameter,154.71 mm Driving band diameter,157
31.
Sulfur trioxide
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Sulfur trioxide is the chemical compound with the formula SO3. In the gaseous form, this species is a significant pollutant and it is prepared on an industrial scale as a precursor to sulfuric acid. Gaseous SO3 is a planar molecule of D3h symmetry, as predicted by VSEPR theory. SO3 belongs to the D3h point group, in terms of electron-counting formalism, the sulfur atom has an oxidation state of +6 and a formal charge of +2. The Lewis structure consists of an S=O double bond and two S–O dative bonds without utilizing d-orbitals, the electrical dipole moment of gaseous sulfur trioxide is zero. This is a consequence of the 120° angle between the S-O bonds, SO3 is the anhydride of H2SO4. Thus, the reaction occurs, SO3 + H2O → H2SO4 The reaction occurs both rapidly and exothermically, too violently to be used in large-scale manufacturing. At or above 340 °C, sulfuric acid, sulfur trioxide, Sulfur trioxide also reacts with sulfur dichloride to yield the useful reagent, thionyl chloride. SO3 + SCl2 → SOCl2 + SO2 SO3 is a strong Lewis acid readily forming crystalline complexes with pyridine, dioxane and these adducts be used as sulfonating agents. Sulfur trioxide can be prepared in the laboratory by the pyrolysis of sodium bisulfate. Sodium pyrosulfate is a product, Dehydration at 315 °C,2 NaHSO4 → Na2S2O7 + H2O Cracking at 460 °C, Na2S2O7 → Na2SO4 + SO3 In contrast. Industrially SO3 is made by the contact process, Sulfur dioxide, which in turn is produced by the burning of sulfur or iron pyrite. After being purified by electrostatic precipitation, the SO2 is then oxidised by oxygen at between 400 and 600 °C over a catalyst. A typical catalyst consists of vanadium pentoxide activated with potassium oxide K2O on kieselguhr or silica support, the nature of solid SO3 is a surprisingly complex area because of structural changes caused by traces of water. Upon condensation of the gas, absolutely pure SO3 condenses into a trimer and this molecular form is a colorless solid with a melting point of 16.8 °C. It adopts a structure described as 3. If SO3 is condensed above 27 °C, then α-SO3 forms, structurally, it is the polymer n. Each end of the polymer is terminated with OH groups, β-SO3, like the alpha form, is fibrous but of different molecular weight, consisting of an hydroxyl-capped polymer, but melts at 32.5 °C
32.
Chlorosulfuric acid
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Chlorosulfuric acid is the inorganic compound with the formula HSO3Cl. It is also known as acid, being the sulfonic acid of chlorine. It is a distillable, colorless liquid which is hygroscopic and a powerful lachrymator, chlorosulfuric acid is a tetrahedral molecule. The formula is more descriptively written SO2Cl, but HSO3Cl is traditional and it is an intermediate, chemically and conceptually, between sulfuryl chloride and sulfuric acid. The compound is rarely obtained pure, the usual format H2SO4, PCl5 + SO22 → ClSO3H + POCl3 + HCl The latter method is more suited for laboratory-scale operations. Chlorosulphonic acid has been used as an agent in Ryan Model 147 reconnaissance drones. ClSO3H reacts violently with water to yield sulfuric acid and HCl, precautions, such as proper ventilation, associated with HCl should be observed. FSO2OH is a strong acid with a diminished tendency to evolve HF. Bromosulfonic acid, BrSO2OH, is unstable, decomposing at its point of 8 °C to give Br2, SO2
33.
Smoke screen
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A smoke screen is smoke released to mask the movement or location of military units such as infantry, tanks, aircraft or ships. Smoke screens are commonly deployed either by a canister or generated by a vehicle and these are canister-type grenades used as a ground-to-ground or ground-to-air signaling device. The body consists of a sheet metal cylinder with a few emission holes on top. In those that produce colored smoke, the filler consists of 250 to 350 grams of colored smoke mixture, in those that produce screening smoke, the filler usually consists of HC smoke mixture or TA smoke mixture. Another type of smoke grenade is filled with phosphorus, which is spread by explosive action. The phosphorus catches fire in the presence of air, and burns with a brilliant yellow flame, WP grenades double as incendiary grenades. Artillery and mortars can fire smoke generating munitions, and are the main means of generating tactical smokescreens on land. As with grenades, artillery shells are available as both emission type smoke shell, and bursting smoke shell, mortars nearly always use bursting smoke rounds because of the smaller size of mortar bombs and the greater efficiency of bursting rounds. Very large or sustained smoke screens are produced by a smoke generator and this machine heats a volatile material to evaporate it, then mixes the vapor with cool external air at a controlled rate so it condenses to a mist with a controlled droplet size. Cruder designs simply boiled waste oil over a heater, while more sophisticated ones sprayed a specially formulated oily composition through nozzles onto a heated plate. Choice of a oil, and careful control of cooling rate. This produces a very effective obscuration per weight of material used and this screen can then be sustained as long as the generator is supplied with oil, and—especially if a number of generators are used—the screen can build up to a considerable size. One 50 gallon drum of fog oil can obscure 60 miles of land in 15 minutes, whilst producing very large amounts of smoke relatively cheaply, these generators have a number of disadvantages. They are much slower to respond than pyrotechnic sources, and require a piece of equipment to be sited at the point of emission of the smoke. They are also heavy and not readily portable, which is a significant problem if the wind shifts. To overcome this problem they may be used in fixed posts widely dispersed over the battlefield. An example of the latter is the M56 Coyote generator, many armoured fighting vehicles can create smoke screens in a similar way, generally by injecting diesel fuel onto the hot exhaust. Warships have sometimes used a variation of the smoke generator
34.
Phenacyl chloride
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Phenacyl chloride is a substituted acetophenone. It is a building block in organic chemistry. Apart from that, it has historically used as a riot control agent. It should not be confused with cyanide, another agent used in chemical warfare, phenacyl chloride is readily available commercially. Because of its significantly greater toxicity, it has largely supplanted by CS gas. The term Mace came into being because it was the brand-name invented by one of the first American manufacturers of CN aerosol sprays, subsequently, In the United States, Mace became synonymous with tear-gas sprays in the same way that Kleenex has become strongly associated with facial tissues. Like CS gas, this compound irritates the mucous membranes, sometimes it can give rise to more generalized reactions such as syncope, temporary loss of balance and orientation. More rarely, cutaneous irritating outbreaks have been observed and allergic contact permanent dermatitis, at high concentrations CN has caused corneal epithelial damage and chemosis. It has also accounted for at least five deaths, which have resulted from pulmonary injury and/or asphyxia
35.
Sulfur mustard
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Sulfur mustard, commonly known as mustard gas, is a cytotoxic and vesicant chemical warfare agent with the ability to form large blisters on exposed skin and in the lungs. Related chemical compounds with chemical structure and similar properties form a class of compounds known collectively as sulfur mustards or mustard agents. Pure sulfur mustards are colorless, viscous liquids at room temperature, when used in impure form, such as warfare agents, they are usually yellow-brown in color and have an odor resembling mustard plants, garlic, or horseradish, hence the name. Sulfur mustard was originally assigned the name LOST, after the scientists Wilhelm Lommel and Wilhelm Steinkopf, Mustard agents are regulated under the 1993 Chemical Weapons Convention. Three classes of chemicals are monitored under this Convention, with sulfur and nitrogen mustard grouped in Schedule 1, Mustard agents could be deployed on the battlefield by means of artillery shells, aerial bombs, rockets, or by spraying from warplanes. Sulfur mustard is the compound with formula 2S. Sulfur mustard is a liquid at normal temperatures. The pure compound has a point of 14 °C and decomposes before boiling at 218 °C. The compound readily eliminates a chloride ion by intramolecular nucleophilic substitution to form a cyclic sulfonium ion, oxidative stress would be another pathology involved in sulfur mustard toxicity. Sulfur mustard is not very soluble in water but is soluble in fat. In the wider sense, compounds with the structural element BCH2CH2X, where X is any leaving group, such compounds can form cyclic onium ions that are good alkylating agents. Examples are bisether, the amines, and sulfur sesquimustard, which has two α-chloroethyl thioether groups connected by an ethylene group and these compounds have a similar ability to alkylate DNA, but their physical properties, e. g. melting points, may vary. Mustard agent has extremely powerful vesicant effects on its victims, in addition, it is strongly mutagenic and carcinogenic, due to its alkylating properties. Because people exposed to mustard agent rarely suffer immediate symptoms, and mustard-contaminated areas may appear completely normal and these are chemical burns and are very debilitating. Mustard agent vapor easily penetrates clothing fabrics such as wool or cotton, if the victims eyes were exposed then they become sore, starting with conjunctivitis, after which the eyelids swell, resulting in temporary blindness. In rare cases of extreme exposure to sulfur mustard vapors, corneal ulceration, anterior chamber scarring. In these severe and infrequent cases, corneal transplantation has been used as a treatment option, miosis may also occur, which is probably the result from the cholinomimetic activity of mustard. At very high concentrations, if inhaled, mustard agent causes bleeding and blistering within the system, damaging mucous membranes
36.
Afghanistan
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Afghanistan, officially the Islamic Republic of Afghanistan, is a landlocked country located within South Asia and Central Asia. It has a population of approximately 32 million, making it the 42nd most populous country in the world. It is bordered by Pakistan in the south and east, Iran in the west, Turkmenistan, Uzbekistan, and Tajikistan in the north and its territory covers 652,000 km2, making it the 41st largest country in the world. The land also served as the source from which the Kushans, Hephthalites, Samanids, Saffarids, Ghaznavids, Ghorids, Khiljis, Mughals, Hotaks, Durranis, the political history of the modern state of Afghanistan began with the Hotak and Durrani dynasties in the 18th century. In the late 19th century, Afghanistan became a state in the Great Game between British India and the Russian Empire. Following the Third Anglo-Afghan War in 1919, King Amanullah unsuccessfully attempted to modernize the country and it remained peaceful during Zahir Shahs forty years of monarchy. A series of coups in the 1970s was followed by a series of wars that devastated much of Afghanistan. The name Afghānistān is believed to be as old as the ethnonym Afghan, the root name Afghan was used historically in reference to a member of the ethnic Pashtuns, and the suffix -stan means place of in Persian. Therefore, Afghanistan translates to land of the Afghans or, more specifically in a historical sense, however, the modern Constitution of Afghanistan states that he word Afghan shall apply to every citizen of Afghanistan. An important site of historical activities, many believe that Afghanistan compares to Egypt in terms of the historical value of its archaeological sites. The country sits at a unique nexus point where numerous civilizations have interacted and it has been home to various peoples through the ages, among them the ancient Iranian peoples who established the dominant role of Indo-Iranian languages in the region. At multiple points, the land has been incorporated within large regional empires, among them the Achaemenid Empire, the Macedonian Empire, the Indian Maurya Empire, and the Islamic Empire. Archaeological exploration done in the 20th century suggests that the area of Afghanistan has been closely connected by culture and trade with its neighbors to the east, west. Artifacts typical of the Paleolithic, Mesolithic, Neolithic, Bronze, urban civilization is believed to have begun as early as 3000 BCE, and the early city of Mundigak may have been a colony of the nearby Indus Valley Civilization. More recent findings established that the Indus Valley Civilisation stretched up towards modern-day Afghanistan, making the ancient civilisation today part of Pakistan, Afghanistan, in more detail, it extended from what today is northwest Pakistan to northwest India and northeast Afghanistan. An Indus Valley site has found on the Oxus River at Shortugai in northern Afghanistan. There are several smaller IVC colonies to be found in Afghanistan as well, after 2000 BCE, successive waves of semi-nomadic people from Central Asia began moving south into Afghanistan, among them were many Indo-European-speaking Indo-Iranians. These tribes later migrated further into South Asia, Western Asia, the region at the time was referred to as Ariana
37.
Argentina
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Argentina, officially the Argentine Republic, is a federal republic in the southern half of South America. With a mainland area of 2,780,400 km2, Argentina is the eighth-largest country in the world, the second largest in Latin America, and the largest Spanish-speaking one. The country is subdivided into provinces and one autonomous city, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system, Argentina claims sovereignty over part of Antarctica, the Falkland Islands, and South Georgia and the South Sandwich Islands. The earliest recorded presence in the area of modern-day Argentina dates back to the Paleolithic period. The country has its roots in Spanish colonization of the region during the 16th century, Argentina rose as the successor state of the Viceroyalty of the Río de la Plata, a Spanish overseas viceroyalty founded in 1776. The country thereafter enjoyed relative peace and stability, with waves of European immigration radically reshaping its cultural. The almost-unparalleled increase in prosperity led to Argentina becoming the seventh wealthiest developed nation in the world by the early 20th century, Argentina retains its historic status as a middle power in international affairs, and is a prominent regional power in the Southern Cone and Latin America. Argentina has the second largest economy in South America, the third-largest in Latin America and is a member of the G-15 and it is the country with the second highest Human Development Index in Latin America with a rating of very high. Because of its stability, market size and growing high-tech sector, the description of the country by the word Argentina has to be found on a Venice map in 1536. In English the name Argentina probably comes from the Spanish language, however the naming itself is not Spanish, Argentina means in Italian of silver, silver coloured, probably borrowed from the Old French adjective argentine of silver > silver coloured already mentioned in the 12th century. The French word argentine is the form of argentin and derives of argent silver with the suffix -in. The Italian naming Argentina for the country implies Argentina Terra land of silver or Argentina costa coast of silver, in Italian, the adjective or the proper noun is often used in an autonomous way as a substantive and replaces it and it is said lArgentina. The name Argentina was probably first given by the Venitian and Genoese navigators, in Spanish and Portuguese, the words for silver are respectively plata and prata and of silver is said plateado and prateado. Argentina was first associated with the silver mountains legend, widespread among the first European explorers of the La Plata Basin. The first written use of the name in Spanish can be traced to La Argentina, a 1602 poem by Martín del Barco Centenera describing the region, the 1826 constitution included the first use of the name Argentine Republic in legal documents. The name Argentine Confederation was also used and was formalized in the Argentine Constitution of 1853. In 1860 a presidential decree settled the name as Argentine Republic
38.
Tunisia
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Tunisia, officially the Republic of Tunisia is the northernmost country in Africa, covering 165,000 square kilometres. Its northernmost point, Cape Angela, is the northernmost point on the African continent and it is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisias population was estimated to be just under 11 million in 2014, Tunisias name is derived from its capital city, Tunis, which is located on Tunisias northeast coast. Geographically, Tunisia contains the end of the Atlas Mountains. Much of the rest of the land is fertile soil. Tunisia is a unitary semi-presidential representative democratic republic and it is considered to be the only full democracy in the Arab World. It has a human development index. In addition, Tunisia is also a state of the United Nations. Close relations with Europe – in particular with France and with Italy – have been forged through economic cooperation, privatisation, in ancient times, Tunisia was primarily inhabited by Berbers. Phoenician immigration began in the 12th century BC, these immigrants founded Carthage, a major mercantile power and a military rival of the Roman Republic, Carthage was defeated by the Romans in 146 BC. The Romans, who would occupy Tunisia for most of the eight hundred years, introduced Christianity. After several attempts starting in 647, the Arabs conquered the whole of Tunisia by 697, the Ottomans held sway for over three hundred years. The French colonization of Tunisia occurred in 1881, Tunisia gained independence with Habib Bourguiba and declared the Tunisian Republic in 1957. In 2011, the Tunisian Revolution resulted in the overthrow of President Zine El Abidine Ben Ali, the country voted for parliament again on 26 October 2014, and for President on 23 November 2014. The word Tunisia is derived from Tunis, an urban hub. The present form of the name, with its Latinate suffix -ia, the French derivative Tunisie was adopted in some European languages with slight modifications, introducing a distinctive name to designate the country. Other languages remained untouched, such as the Russian Туни́с and Spanish Túnez, in this case, the same name is used for both country and city, as with the Arabic تونس, and only by context can one tell the difference. The name Tunis can be attributed to different origins and it is generally associated with the Berber root ⵜⵏⵙ, transcribed tns, which means to lay down or encampment
39.
Bosnia and Herzegovina
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Bosnia and Herzegovina, sometimes called Bosnia-Herzegovina, and, in short, often known informally as Bosnia, is a country in Southeastern Europe located on the Balkan Peninsula. Sarajevo is the capital and largest city, in the central and eastern interior of the country the geography is mountainous, in the northwest it is moderately hilly, and the northeast is predominantly flatland. The inland is a larger region and has a moderate continental climate, with hot summers and cold. The southern tip of the country has a Mediterranean climate and plain topography, Bosnia and Herzegovina is a region that traces permanent human settlement back to the Neolithic age, during and after which it was populated by several Illyrian and Celtic civilizations. Culturally, politically, and socially, the country has a rich history, the Ottomans brought Islam to the region, and altered much of the cultural and social outlook of the country. This was followed by annexation into the Austro-Hungarian Monarchy, which lasted up until World War I. In the interwar period, Bosnia was part of the Kingdom of Yugoslavia and after World War II, following the dissolution of Yugoslavia, the country proclaimed independence in 1992, which was followed by the Bosnian War, lasting until late 1995. The country is home to three ethnic groups or, officially, constituent peoples, as specified in the constitution. Bosniaks are the largest group of the three, with Serbs second and Croats third, a native of Bosnia and Herzegovina, regardless of ethnicity, is identified in English as a Bosnian. The terms Herzegovinian and Bosnian are maintained as a rather than ethnic distinction. Moreover, the country was simply called Bosnia until the Austro-Hungarian occupation at the end of the 19th century, Bosnia and Herzegovina has a bicameral legislature and a three-member Presidency composed of a member of each major ethnic group. The Federation of Bosnia and Herzegovina is itself complex and consists of 10 cantons, additionally, the country has been a member of the Council of Europe since April 2002 and a founding member of the Mediterranean Union upon its establishment in July 2008. The name is believed to have derived from the hydronym of the river Bosna coursing through the Bosnian heartland. According to philologist Anton Mayer the name Bosna could be derived from Illyrian Bass-an-as which would be a diversion of the Proto-Indo-European root bos or bogh, meaning the running water. According to English medievalist William Miller the Slavic settlers in Bosnia adapted the Latin designation Basante, to their own idiom by calling the stream Bosna, the name Herzegovina originates from Bosnian magnate Stephen Vukčić Kosačas title, Herceg of Hum and the Coast. Hum, formerly Zahumlje, was a medieval principality that was conquered by the Bosnian Banate in the first half of the 14th century. Bosnia is located in the western Balkans, bordering Croatia to the north and west, Serbia to the east and it has a coastline about 20 kilometres long surrounding the city of Neum. It lies between latitudes 42° and 46° N, and longitudes 15° and 20° E, the countrys name comes from the two regions Bosnia and Herzegovina, which have a very vaguely defined border between them
40.
Brazil
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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
41.
Cameroon
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Cameroon, officially the Republic of Cameroon, is a country in Central Africa. It is bordered by Nigeria to the west, Chad to the northeast, the Central African Republic to the east, and Equatorial Guinea, Gabon, Cameroons coastline lies on the Bight of Biafra, part of the Gulf of Guinea and the Atlantic Ocean. French and English are the languages of Cameroon. The country is referred to as Africa in miniature for its geological and cultural diversity. Natural features include beaches, deserts, mountains, rainforests, the country is well known for its native styles of music, particularly makossa and bikutsi, and for its successful national football team. Early inhabitants of the territory included the Sao civilisation around Lake Chad, portuguese explorers reached the coast in the 15th century and named the area Rio dos Camarões, which became Cameroon in English. Fulani soldiers founded the Adamawa Emirate in the north in the 19th century, Cameroon became a German colony in 1884 known as Kamerun. After World War I, the territory was divided between France and the United Kingdom as League of Nations mandates, the Union des Populations du Cameroun political party advocated independence, but was outlawed by France in the 1950s, leading to the Cameroonian Independence War. It waged war on French and UPC militant forces until 1971, in 1960, the French-administered part of Cameroon became independent as the Republic of Cameroun under President Ahmadou Ahidjo. The southern part of British Cameroons federated with it in 1961 to form the Federal Republic of Cameroon, the federation was abandoned in 1972. The country was renamed the United Republic of Cameroon in 1972, Cameroon enjoys relatively high political and social stability. This has permitted the development of agriculture, roads, railways, nevertheless, large numbers of Cameroonians live in poverty as subsistence farmers. Power lies firmly in the hands of the president since 1982, Paul Biya. The English-speaking territories of Cameroon have grown increasingly alienated from the government, politicians and civil society in English-speaking regions have called for greater decentralization and even complete separation or independence from the former French-governed territories. The territory of present-day Cameroon was first settled during the Neolithic Era, the longest continuous inhabitants are groups such as the Baka. From here, Bantu migrations into eastern, southern, and central Africa are believed to have originated about 2,000 years ago, the Sao culture arose around Lake Chad c. AD500 and gave way to the Kanem and its successor state, kingdoms, fondoms, and chiefdoms arose in the west. Portuguese sailors reached the coast in 1472 and they noted an abundance of the ghost shrimp Lepidophthalmus turneranus in the Wouri River and named it Rio dos Camarões, which became Cameroon in English
42.
Cyprus
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Cyprus, officially the Republic of Cyprus, is an island country in the Eastern Mediterranean and the third largest and third most populous island in the Mediterranean. It is located south of Turkey, west of Syria and Lebanon, northwest of Israel and Palestine, north of Egypt, the earliest known human activity on the island dates to around the 10th millennium BC. Archaeological remains from this include the well-preserved Neolithic village of Khirokitia. Cyprus was settled by Mycenaean Greeks in two waves in the 2nd millennium BC, Cyprus was placed under British administration based on Cyprus Convention in 1878 and formally annexed by Britain in 1914. While Turkish Cypriots made up 18% of the population, the partition of Cyprus and creation of a Turkish state in the north became a policy of Turkish Cypriot leaders, following nationalist violence in the 1950s, Cyprus was granted independence in 1960. On 15 July 1974, a coup détat was staged by Greek Cypriot nationalists and elements of the Greek military junta in an attempt at enosis and these events and the resulting political situation are matters of a continuing dispute. The Cyprus Republic has de jure sovereignty over the island of Cyprus, as well as its territorial sea and exclusive economic area, another nearly 4% of the islands area is covered by the UN buffer zone. The international community considers the part of the island as territory of the Republic of Cyprus occupied by Turkish forces. The occupation is viewed as illegal under law, amounting to illegal occupation of EU territory since Cyprus became a member of the European Union. Cyprus is a major tourist destination in the Mediterranean, on 1 January 2008, the Republic of Cyprus joined the eurozone. The earliest attested reference to Cyprus is the 15th century BC Mycenaean Greek
43.
Chile
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Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, Chilean territory includes the Pacific islands of Juan Fernández, Salas y Gómez, Desventuradas, and Easter Island in Oceania. Chile also claims about 1,250,000 square kilometres of Antarctica, the arid Atacama Desert in northern Chile contains great mineral wealth, principally copper. Southern Chile is rich in forests and grazing lands, and features a string of volcanoes and lakes, the southern coast is a labyrinth of fjords, inlets, canals, twisting peninsulas, and islands. Spain conquered and colonized Chile in the century, replacing Inca rule in northern and central Chile. After declaring its independence from Spain in 1818, Chile emerged in the 1830s as a relatively stable authoritarian republic, in the 1960s and 1970s the country experienced severe left-right political polarization and turmoil. The regime, headed by Augusto Pinochet, ended in 1990 after it lost a referendum in 1988 and was succeeded by a coalition which ruled through four presidencies until 2010. Chile is today one of South Americas most stable and prosperous nations and it leads Latin American nations in rankings of human development, competitiveness, income per capita, globalization, state of peace, economic freedom, and low perception of corruption. It also ranks high regionally in sustainability of the state, Chile is a founding member of the United Nations, the Union of South American Nations and the Community of Latin American and Caribbean States. There are various theories about the origin of the word Chile, another theory points to the similarity of the valley of the Aconcagua with that of the Casma Valley in Peru, where there was a town and valley named Chili. Another origin attributed to chilli is the onomatopoeic cheele-cheele—the Mapuche imitation of the warble of a locally known as trile. The Spanish conquistadors heard about this name from the Incas, ultimately, Almagro is credited with the universalization of the name Chile, after naming the Mapocho valley as such. The older spelling Chili was in use in English until at least 1900 before switching over to Chile, stone tool evidence indicates humans sporadically frequented the Monte Verde valley area as long as 18,500 years ago. About 10,000 years ago, migrating Native Americans settled in fertile valleys, settlement sites from very early human habitation include Monte Verde, Cueva del Milodon and the Pali Aike Craters lava tube. They fought against the Sapa Inca Tupac Yupanqui and his army, the result of the bloody three-day confrontation known as the Battle of the Maule was that the Inca conquest of the territories of Chile ended at the Maule river. The next Europeans to reach Chile were Diego de Almagro and his band of Spanish conquistadors, the Spanish encountered various cultures that supported themselves principally through slash-and-burn agriculture and hunting. The conquest of Chile began in earnest in 1540 and was carried out by Pedro de Valdivia, one of Francisco Pizarros lieutenants, who founded the city of Santiago on 12 February 1541. Although the Spanish did not find the gold and silver they sought, they recognized the agricultural potential of Chiles central valley
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Ecuador
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Ecuador also includes the Galápagos Islands in the Pacific, about 1,000 kilometres west of the mainland. What is now Ecuador was home to a variety of Amerindian groups that were incorporated into the Inca Empire during the 15th century. The territory was colonized by Spain during the 16th century, achieving independence in 1820 as part of Gran Colombia, Spanish is the official language and is spoken by a majority of the population, though 13 Amerindian languages are also recognized, including Quichua and Shuar. The capital city is Quito, while the largest city is Guayaquil, in reflection of the countrys rich cultural heritage, the historical center of Quito was declared a UNESCO World Heritage Site in 1978. Cuenca, the third-largest city, was declared a World Heritage Site in 1999 as an outstanding example of a planned. Ecuador has an economy that is highly dependent on commodities, namely petroleum. The country is classified as a medium-income country, Ecuador is a democratic presidential republic. The new constitution of 2008 is the first in the world to recognize legally enforceable Rights of Nature, Ecuador is also known for its rich ecology, hosting many endemic plants and animals, such as those of the Galápagos Islands. It is one of 17 megadiverse countries in the world, various peoples had settled in the area of the future Ecuador before the arrival of the Incas. They developed different languages while emerging as unique ethnic groups, even though their languages were unrelated, these groups developed similar groups of cultures, each based in different environments. Over time these groups began to interact and intermingle with each other so that groups of families in one area became one community or tribe, with a similar language and culture. Many civilizations arose in Ecuador, such as the Valdivia Culture and Machalilla Culture on the coast, the Quitus, each civilization developed its own distinctive architecture, pottery, and religious interests. Eventually, through wars and marriage alliances of their leaders, a group of nations formed confederations, one region consolidated under a confederation called the Shyris, which exercised organized trading and bartering between the different regions. Its political and military came under the rule of the Duchicela blood-line. The native confederations that gave them the most problems were deported to distant areas of Peru, Bolivia, similarly, a number of loyal Inca subjects from Peru and Bolivia were brought to Ecuador to prevent rebellion. Thus, the region of highland Ecuador became part of the Inca Empire in 1463 sharing the same language, in contrast, when the Incas made incursions into coastal Ecuador and the eastern Amazon jungles of Ecuador, they found both the environment and indigenous people more hostile. Moreover, when the Incas tried to subdue them, these indigenous people withdrew to the interior, as a result, Inca expansion into the Amazon basin and the Pacific coast of Ecuador was hampered. The indigenous people of the Amazon jungle and coastal Ecuador remained relatively autonomous until the Spanish soldiers, the Amazonian people and the Cayapas of Coastal Ecuador were the only groups to resist Inca and Spanish domination, maintaining their language and culture well into the 21st century
Afghanistan
Argentina
Tunisia
Bosnia and Herzegovina
Brazil
Cameroon
Cyprus
Chile
Ecuador
Iran
South Korea
Laos
Lebanon
Morocco
Pakistan: 144 in service with the Pakistan Army.[5]
Peru
Philippines
Portugal
Taiwan
Thailand: In reserve
Turkey
Uruguay
Venezuela
Vietnam
Indonesia
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Khmer Republic
Canada
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Denmark
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Greece
Israel
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Libya
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Netherlands
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Singapore
Spain
United States
Republic of Vietnam
Yugoslavia (passed on to successor states)
