1.
Projectile
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A projectile is any object thrown into space by the exertion of a force. Although any object in motion through space may be called a projectile, mathematical equations of motion are used to analyze projectile trajectory. Blowguns and pneumatic rifles use compressed gases, while most other guns and cannons utilize expanding gases liberated by sudden chemical reactions, light-gas guns use a combination of these mechanisms. Railguns utilize electromagnetic fields to provide a constant acceleration along the length of the device. Some projectiles provide propulsion during flight by means of an engine or jet engine. In military terminology, a rocket is unguided, while a missile is guided, note the two meanings of rocket, an ICBM is a guided missile with a rocket engine. An explosion, whether or not by a weapon, causes the debris to act as high velocity projectiles. An explosive weapon, or device may also be designed to produce high velocity projectiles by the break-up of its casing. Many projectiles, e. g. shells, may carry a charge or another chemical or biological substance. Aside from explosive payload, a projectile can be designed to cause damage, e. g. fire. Typical kinetic energy weapons are blunt projectiles such as rocks and round shots, pointed ones such as arrows, among projectiles that do not contain explosives are those launched from railguns, coilguns, and mass drivers, as well as kinetic energy penetrators. Other types of weapons are accelerated over time by a rocket engine. In either case, it is the energy of the projectile that destroys its target. Some kinetic weapons for targeting objects in spaceflight are anti-satellite weapons, since in order to reach an object in orbit it is necessary to attain an extremely high velocity, their released kinetic energy alone is enough to destroy their target, explosives are not necessary. For example, the energy of TNT is 4.6 MJ/kg, and this saves costly weight and there is no detonation to be precisely timed. This method, however, requires direct contact with the target, some hit-to-kill warheads are additionally equipped with an explosive directional warhead to enhance the kill probability. With regard to weapons, the Arrow missile and MIM-104 Patriot PAC-2 have explosives, while the Kinetic Energy Interceptor, Lightweight Exo-Atmospheric Projectile. A kinetic projectile can also be dropped from aircraft and this is applied by replacing the explosives of a regular bomb with a non-explosive material, for a precision hit with less collateral damage
2.
V-2 rocket
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The V-2, technical name Aggregat 4, was the worlds first long-range guided ballistic missile. The V-2 rocket also became the first artificial object to cross the boundary of space with the launch of MW18014 on 20 June 1944. Research into military use of long range rockets began when the studies of graduate student Wernher von Braun attracted the attention of the German Army, a series of prototypes culminated in the A-4, which went to war as the V-2. Beginning in September 1944, over 3,000 V-2s were launched by the German Wehrmacht against Allied targets during the war, first London and later Antwerp and Liège. As Germany collapsed, teams from the Allied forces—the United States, the United Kingdom, Wernher von Braun and over 100 key V-2 personnel surrendered to the Americans. Eventually, many of the original V-2 team ended up working at the Redstone Arsenal, the US also captured enough V-2 hardware to build approximately 80 of the missiles. The Soviets gained possession of the V-2 manufacturing facilities after the war, re-established V-2 production, in the late 1920s, a young Wernher von Braun bought a copy of Hermann Oberths book, Die Rakete zu den Planetenräumen. Starting in 1930, he attended the Technical University of Berlin, von Braun was working on his doctorate when the Nazi Party gained power in Germany. An artillery captain, Walter Dornberger, arranged an Ordnance Department research grant for von Braun, von Brauns thesis, Construction, Theoretical, and Experimental Solution to the Problem of the Liquid Propellant Rocket, was kept classified by the German Army and was not published until 1960. By the end of 1934, his group had launched two rockets that reached heights of 2.2 and 3.5 km. At the time, Germany was highly interested in American physicist Robert H. Goddards research, before 1939, German engineers and scientists occasionally contacted Goddard directly with technical questions. Von Braun used Goddards plans from various journals and incorporated them into the building of the Aggregat series of rockets, during 28–30 September 1939, Der Tag der Weisheit conference met at Peenemünde to initiate the funding of university research to solve rocket problems. By late 1941, the Army Research Center at Peenemünde possessed the essential to the success of the A-4. The four key technologies for the A-4 were large liquid-fuel rocket engines, supersonic aerodynamics, gyroscopic guidance, at the time, Adolf Hitler was not particularly impressed by the V-2, he pointed out that it was merely an artillery shell with a longer range and much higher cost. Hitler was sufficiently impressed by the enthusiasm of its developers, and needed a weapon to maintain German morale. The V-2s were constructed at the Mittelwerk site by prisoners from Mittelbau-Dora, the A-4 used a 74% ethanol/water mixture for fuel and liquid oxygen for oxidizer. The rocket reached a height of 80 km after shutting off the engine, the fuel and oxidizer pumps were driven by a steam turbine, and the steam was produced by concentrated hydrogen peroxide with sodium permanganate catalyst. Both the alcohol and oxygen tanks were an aluminium-magnesium alloy, the combustion burner reached a temperature of 2,500 to 2,700 °C
3.
United Kingdom
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The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, the United Kingdom includes the island of Great Britain, Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state—the Republic of Ireland. The Irish Sea lies between Great Britain and Ireland, with an area of 242,500 square kilometres, the United Kingdom is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants, together, this makes it the fourth-most densely populated country in the European Union. The United Kingdom is a monarchy with a parliamentary system of governance. The monarch is Queen Elizabeth II, who has reigned since 6 February 1952, other major urban areas in the United Kingdom include the regions of Birmingham, Leeds, Glasgow, Liverpool and Manchester. The United Kingdom consists of four countries—England, Scotland, Wales, the last three have devolved administrations, each with varying powers, based in their capitals, Edinburgh, Cardiff and Belfast, respectively. The relationships among the countries of the UK have changed over time, Wales was annexed by the Kingdom of England under the Laws in Wales Acts 1535 and 1542. A treaty between England and Scotland resulted in 1707 in a unified Kingdom of Great Britain, which merged in 1801 with the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland. Five-sixths of Ireland seceded from the UK in 1922, leaving the present formulation of the United Kingdom of Great Britain, there are fourteen British Overseas Territories. These are the remnants of the British Empire which, at its height in the 1920s, British influence can be observed in the language, culture and legal systems of many of its former colonies. The United Kingdom is a country and has the worlds fifth-largest economy by nominal GDP. The UK is considered to have an economy and is categorised as very high in the Human Development Index. It was the worlds first industrialised country and the worlds foremost power during the 19th, the UK remains a great power with considerable economic, cultural, military, scientific and political influence internationally. It is a nuclear weapons state and its military expenditure ranks fourth or fifth in the world. The UK has been a permanent member of the United Nations Security Council since its first session in 1946 and it has been a leading member state of the EU and its predecessor, the European Economic Community, since 1973. However, on 23 June 2016, a referendum on the UKs membership of the EU resulted in a decision to leave. The Acts of Union 1800 united the Kingdom of Great Britain, Scotland, Wales and Northern Ireland have devolved self-government
4.
Operation Backfire (WWII)
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Operation Backfire was a military scientific operation during and after the Second World War, which was performed mainly by British staff. It was part of the Allies scramble to acquire German technology, since April 30 he had been in the Nordhausen area searching the smaller laboratories for V-2 technicians. Also Auxiliary Territorial Service Junior Commander Joan Bernard played a role in this operation, the Americans had already taken away most of the V2 rocket technology from the German underground Mittelwerk factory at the Mittelbau-Dora concentration camp near Nordhausen. Before the Soviets took control of area, the British were given the opportunity to gather materiel. They were able to assemble parts sufficient to build eight V2 rockets, some parts were still missing and there was a search throughout Germany. The US supplied some tail assemblies from those that they had taken, the handling and launch procedures were unknown, so German personnel were ordered to perform these, which for the most part they did willingly. At the site of the former there is a trough. During and after the launches, the British attempted to recruit German personnel, even those transferred from US custody and due to be returned, the technical aspects of the operation were detailed in a five-volume report. According to the Report on Operation Backfire, there were three Cuxhaven launches, Backfire Rocket One was prepared for launch on 1 October, but did not function. Backfire Rocket Two was prepared for launch on 2 October and was launched without difficulty, the second Cuxhaven launch took place on 4 October with Backfire Rocket One. A third and final rocket was launched for representatives of the press, according to one site, there was a fourth launch on 17 October 1945 that reached an altitude of about 80 kilometres
5.
Harpoon (missile)
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The Harpoon is an all-weather, over-the-horizon, anti-ship missile system, developed and manufactured by McDonnell Douglas. In 2004, Boeing delivered the 7, 000th Harpoon unit since the introduction in 1977. The missile system has also further developed into a land-strike weapon. The regular Harpoon uses active homing, and a low-level. The missiles launch platforms include, Fixed-wing aircraft Surface ships Submarines, Coastal defense batteries, in 1965 the United States Navy began studies for a missile in the 45 kilometres range class for use against surfaced submarines. The name Harpoon was assigned to the project, Harpoon was primarily developed for use on US Navy warships such as the Ticonderoga-class cruiser as their principal anti-ship weapon system. The Harpoon was purchased by many American allies, including Pakistan, Japan, Singapore, South Korea, Taiwan, the United Arab Emirates and most NATO countries. The Royal Australian Air Force is capable of firing AGM-84 series missiles from its F/A-18F Super Hornets, F/A-18A/B Hornets, and AP-3C Orion aircraft, the Royal Australian Navy deploys the Harpoon on major surface combatants and in the Collins-class submarines. The Spanish Air Force and the Chilean Navy are also AGM-84D customers, and they deploy the missiles on ships, and F/A-18s, F-16s. The British Royal Navy deploys the Harpoon on several types of surface ship, the Royal Canadian Navy carries Harpoon missiles on its Halifax-class frigates. The Republic of Singapore Air Force also operates five modified Fokker 50 Maritime Patrol Aircraft which are fitted with the sensors needed to fire the Harpoon missile, the Pakistani Navy carries the Harpoon missile on its frigates and P-3C Orions. The Turkish Navy carries Harpoons on surface warships and Type 209 submarines, the Turkish Air Force will be armed with the SLAM-ER. S. Navy Knox-class frigates and the four former USN Kidd-class destroyers which have sold to Taiwan. The two Zwaardvis/Hai Lung submarines and 12 P-3C Orion aircraft can use the missile. The Block 1 missiles were designated AGM/RGM/UGM-84A in US service and UGM-84B in the UK, Block 1B standard missiles were designated AGM/RGM/UGM-84C, Block 1C missiles were designated AGM/RGM/UGM-84D. This version featured a fuel tank and re-attack capability, but was not produced in large numbers because its intended mission was considered to be unlikely following the events of 1991–92. Block 1D missiles were designated RGM/AGM-84F, Block 1G missiles AGM/RGM/UGM-84G, the original SLAM-ER missiles were designated AGM-84H and later ones the AGM-84K. Block 1J was a proposal for an upgrade, AGM/RGM/UGM-84J Harpoon
6.
Precision-guided munition
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For the weapon systems customized to a single person, see personalized gun. A precision-guided munition is a guided munition intended to hit a specific target, to minimize collateral damage. Because the damage effects of explosive weapons decrease with distance due to an inverse cube law, thus, even if some guided bombs miss, fewer air crews are put at risk and the harm to civilians and the amount of collateral damage may be reduced. The advent of precision-guided munitions resulted in the renaming of older bombs unguided bombs, dumb bombs, recognizing the difficulty of hitting moving ships during the Spanish Civil War, the Germans were first to develop steerable munitions, using radio control or wire guidance. The U. S. tested TV-guided, semi-active radar-guided, in addition, the U. S. tested the rocket-propelled Gargoyle, which never entered service. Japanese PGMs—with the exception of the anti-ship air-launched, rocket-powered, human-piloted Ohka suicide flying bomb—did not see combat in World War II, prior to the war, the British experimented with radio-controlled remotely guided planes laden with explosive, such as Larynx. The U. S. programs restarted in the Korean War, in the 1960s, the electro-optical bomb was reintroduced. They were equipped with cameras and flare sights, by which the bomb would be steered until the flare superimposed the target. The camera bombs transmitted a bombs eye view of the back to a controlling aircraft. An operator in this aircraft then transmitted control signals to steerable fins fitted to the bomb, in World War II, the U. S. National Defense Research Committee developed the VB-6 Felix, which used infrared to home on ships. While it entered production in 1945, it was never employed operationally, Precision guidance has been applied to weapons other than conventional bomb warheads. The Raytheon Maverick heavy anti-tank missile has among its various marks guidance systems such as electro-optical, imaging infra-red, the Pakistani NESCOM H-2 MUPSOW and H-4 MUPSOW is an electro-optical is a drop and forget precision-guided glide bomb. The Israeli Elbit Opher is also an I, during NATOs air campaign in 1999 in Kosovo the new Italian AF AMX employed the Opher. All such bombs work in much the way, relying on the target being illuminated, or painted. They have the significant disadvantage of not being usable in poor weather where the target illumination cannot be seen, or where a target designator cannot get near the target. The laser designator sends its beam in a series of pulses so the bomb cannot be confused by an ordinary laser. Laser-guided weapons did not become commonplace until the advent of the microchip and they made their practical debut in Vietnam, where on 13 May 1972 they were used in the second successful attack on the Thanh Hóa Bridge. This structure had previously been the target of 800 American sorties and was destroyed in each of two successful attacks, the other being on 27 April 1972 using Walleyes
7.
Rocket (weapon)
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A rocket is a self-propelled, unguided weapon system powered by a rocket motor. Examples of modern surface-to-surface rocket systems include the BM-27 Uragan and M270 Multiple Launch Rocket System, in military parlance, a rocket differs from a missile primarily by lacking an active guidance system, early missiles were known as guided rockets or guided missiles. Some rockets were developed as unguided systems and later upgraded to guided versions, like the GMLRS, rockets or missiles that travel underwater, like the VA-111 Shkval, are known as torpedoes no matter what their propulsion system is. The use of rockets as some form of artillery dates back to medieval China where devices such as arrows were used, and gradually spread to Europe. Rockets became a significant weapon during the 20th Century, when precise manufacturing processes made relatively accurate rockets possible, rockets have been used as an artillery weapon for centuries, and continue to be used in the modern age after being extensively modernized in World War II. Rockets in the artillery role compliment traditional field guns, at which they are superior in some ways, Rocket artillery tends to be simpler, lighter and more mobile than guns or howitzers, most of which must be emplaced. The saturation fire produced by rocket artillery is only somewhat approximated in effectiveness with gun artillery via the time on target barrage method, time-sensitive soft target interdiction is where rocket artillery is particularly useful. With the invention of the tank, the infantry required a weapon to counter the threat, development continued after the war, with weapons such as the RPG-7, although a need to increase range led to the development of guided weapons to fulfill the anti-tank role. Most modern armies now use guided missiles for long-range engagements and rockets for close-range or emergency use, unguided rockets are a widely used weapon system and have been launched from aircraft since the early 20th century, to attack land, sea and air targets. Even after the development of guided missiles, rockets remain useful for short-range attacks – typically for close air support missions, the standard NATO calibre is 70mm and is meanwhile considered as the international calibre. The rockets can be fired from a variety of rotary and fixed-wing platforms, the 70mm rocket system offers several warhead configurations that fulfill a wide range of special mission requirements to defeat soft to lightly armored targets
8.
Direct Attack Guided Rocket
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The Direct Attack Guided Rocket is a weapons system under development by Lockheed Martin. The program goal is to provide a low cost 2.75 inch precision guided rocket which is compatible with existing Hellfire II systems, DAGR also offers a lock-on before launch capability that is not compatible with the electronics in existing Hydra 70 launchers. Diameter,2.75 in Length,75 in Wingspan,8.75 in Weight,35.0 lb Guidance, Range from Sea Level, Min,1.5 km Max,5 km Range from 20,000 feet,12 km. Warhead, M151 warhead with M423 fuze March 2005 – Program started, february 2006 – 1st flight test. October 2008 – 8th flight test and 1st ever 2.75 guided rocket live warhead flight test, March 2009 – 1st platform flight test – Apache AH-64D Attack Helicopter. July 2009 – 2nd platform flight test – Little Bird AH-6, March 2010 – 3rd platform test – Lockheed Martins DAGR Guided Rocket Fires Successfully From Kiowa Warrior Helicopter. May 2012 – DAGR hits a target moving 25 mph fired from an AH-64D Apache 3.5 km away. September 2012 – DAGR successfully hits stationary targets while launched from ground-based mounts, two missiles flew 3.5 kilometers and hit the target within one foot of the illuminated laser spot. February 2013 – DAGR is launched from a Lockheed Martin JLTV and it locked onto the laser spot two seconds after launch, flew 5 km down range and impacted the target within 1 meter of the laser spot. March 2014 – DAGR completed airworthiness tests from the AH-64D Apache, over 40 DAGRs had been fired in total since the start of the program. Following the Royal Jordanian Air Forces purchase of Boeing AH-6 helicopters, Advanced Precision Kill Weapon System Low-Cost Guided Imaging Rocket Guided Advanced Tactical Rocket - Laser Roketsan Cirit Ugroza Others & History
9.
Missile guidance
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Missile guidance refers to a variety of methods of guiding a missile or a guided bomb to its intended target. The missiles target accuracy is a factor for its effectiveness. Guidance systems improve missile accuracy by improving its Single Shot Kill Probability and these guidance technologies can generally be divided up into a number of categories, with the broadest categories being active, passive and preset guidance. The concept of missile guidance originated at least as early as World War I, in World War II, guided missiles were first developed, as part of the German V-weapons program. Project Pigeon was American behaviorist B. F. Skinners attempt to develop a pigeon-guided missile, Guidance systems are divided into different categories according to what type of target they are designed for - either fixed targets or moving targets. The weapons can be divided into two categories, Go-Onto-Target and Go-Onto-Location-in-Space guidance systems. A GOT missile can target either a moving or fixed target, the trajectory that a missile takes while attacking a moving target is dependent upon the movement of the target. Also, a target can be an immediate threat to the sender of the missile. The target needs to be eliminated in a fashion in order to preserve the integrity of the sender. In GOLIS systems the problem is simpler because the target is not moving, the target tracker is also placed on the launching platform. Homing Guidance, The guidance computers are in the missile and in the target tracker and these systems include, Command guidance - The missile tracker is on the launching platform. These missiles are controlled by the launching platform that sends all control orders to the missile. The 2 variants are Command to Line-Of-Sight Command Off Line-Of-Sight Line-Of-Sight Beam Riding Guidance - The target tracker is on board the missile, the missile already has some orientation capability meant for flying inside the beam that the launching platform is using to illuminate the target. It can be manual or automatic, the CLOS system uses only the angular coordinates between the missile and the target to ensure the collision. The missile is made to be in the line of sight between the launcher and the target, and any deviation of the missile from this line is corrected. That is, the missile is controlled to stay as close as possible on the LOS to the target after missile capture. is used to transmit signals from a ground controller to the missile. More specifically, if the acceleration is taken into account and added to the nominal acceleration generated by the beam-rider equations. Thus, the beam rider acceleration command is modified to include an extra term, the beam-riding performance described above can thus be significantly improved by taking the beam motion into account
10.
Warhead
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The term warhead refers to the explosive or toxic material that is delivered by a missile, rocket, or torpedo. Types of warheads include, Explosive, An explosive charge is used to disintegrate the target, conventional, Chemicals such as gunpowder and high explosives store significant energy within their molecular bonds. This energy can be released quickly by a trigger, such as an electric spark, thermobaric weapons enhance the blast effect by utilizing the surrounding atmosphere in their explosive reactions. Blast, A strong shock wave is provided by the detonation of the explosive, fragmentation, Metal fragments are projected at high velocity to cause damage or injury. Continuous rod, Metal bars welded on their ends form a cylinder of interconnected rods. The rapidly expanding ring produces a planar cutting effect that is devastating against military aircraft, shaped charge, The effect of the explosive charge is focused onto a specially shaped metal liner to project a hypervelocity jet of metal, to perforate heavy armour. Nuclear, A runaway nuclear fission or nuclear fusion reaction causes immense energy release, chemical, A toxic chemical, such as poison gas or nerve gas, is dispersed, which is designed to injure or kill human beings. Biological, An infectious agent, such as spores, is dispersed. Often, a biological or chemical warhead will use a charge for rapid dispersal. Type of detonators include Guidance system List of aircraft weapons List of missiles Nuclear weapon yield Missile The Nuclear Weapon Archive, the B61 Bomb - Intermediate yield strategic and tactical thermonuclear bomb. Atomic Audit - The Costs and Consequences of U. S, ogden Air Logistics Center at Hill AFB, Utah. NNSA Achieves Significant Milestone for B61 Bomb, Nuclear Weapons, The Secret History, pp. 162–164
11.
Air-to-surface missile
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An air-to-surface missile or air-to-ground missile is a missile designed to be launched from military aircraft at targets on land or sea. There are also unpowered guided glide bombs not considered missiles, the two most common propulsion systems for air-to-surface missiles are rocket motors, usually with shorter range, and slower, longer-range jet engines. Some Soviet-designed air-to-surface missiles are powered by ramjets, giving them both long range and high speed, guidance for air-to-surface missiles is typically via laser guidance, infrared guidance, optical guidance or via satellite guidance signals. The type of guidance depends on the type of target, ships, for example, may be detected via passive radar or active radar homing, less effective against multiple, small, fast-moving land targets. There is some cross-over between air-to-surface missiles and surface-to-surface missiles, for example, there was an air-launched version of the Tomahawk missile, superseded by the AGM-86 ALCM. Other missiles used in both roles include the Penguin and AGM-84 Harpoon anti-ship missiles, most air-to-surface missiles are fire-and-forget from a standoff distance, allowing the attacker to withdraw without approaching further after launch. Some missiles have long range to be launched over the horizon. For long-range missiles this difference can be small, but short-range missiles have a much longer range when launched at altitude. There have been examples of air-launched ballistic missiles, but they are rare, sometimes air-to-surface missiles are divided into the categories of tactical and strategic. Typically missiles with chemical explosive or small nuclear warheads are classed as tactical, mP-1000 Martín Pescador AS-25K MAR-1 Anti-radiation missile FOG-MPM Fiber Optics Guided Multiple Purpose Missile. - Air-to-Ground Ammunition Kongsberg Gruppen Lockheed Martin - JASSM MBDA missile systems - solutions NTI
12.
Ballistic missile
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A ballistic missile is a missile that follows a ballistic trajectory with the objective of delivering one or more warheads to a predetermined target. A ballistic missile is only guided during relatively brief periods of flight and this contrasts to a cruise missile, which is aerodynamically guided in powered flight. Long range intercontinental ballistic missiles are launched on a flight trajectory. Shorter range ballistic missiles stay within the Earths atmosphere, the earliest use of rockets as a weapon date to the 13th Century. A pioneer ballistic missile was the A-4, commonly known as the V-2 rocket developed by Nazi Germany in the 1930s and 1940s under the direction of Wernher von Braun. The first successful launch of a V-2 was on October 3,1942, by the end of World War II in May 1945, over 3,000 V-2s had been launched. The R-7 Semyorka was the first intercontinental ballistic missile, a total of 30 nations have deployed operational ballistic missiles. Development continues with around 100 ballistic missile tests in 2007, mostly by China, Iran. In 2010, the U. S. and Russian governments signed a treaty to reduce their inventory of intercontinental ballistic missiles over a period to 1550 units each. Ballistic missiles can be launched from fixed sites or mobile launchers, including vehicles, aircraft, ships, the powered flight portion can last from a few tenths of seconds to several minutes and can consist of multiple rocket stages. When in space and no more thrust is provided, the missile enters free-flight, the re-entry stage begins at an altitude where atmospheric drag plays a significant part in missile trajectory, and lasts until missile impact. The course taken by ballistic missiles has two significant desirable properties, first, ballistic missiles that fly above the atmosphere have a much longer range than would be possible for cruise missiles of the same size. Powered rocket flight through thousands of kilometers of air would require greater amounts of fuel, making the launch vehicles larger and easier to detect. Powered missiles that can cover similar ranges, such as missiles, do not use rocket motors for the majority of their flight. Despite this, cruise missiles have not made ballistic missiles obsolete, due to the major advantage. An ICBM can strike a target within a 10,000 km range in about 30 to 35 minutes, with terminal speeds of over 5,000 m/s, ballistic missiles are much harder to intercept than cruise missiles, due to the much shorter time available to intercept them. This is why ballistic missiles are some of the most feared weapons available, despite the fact that cruise missiles are cheaper, more mobile, Ballistic missiles can vary widely in range and use, and are often divided into categories based on range. A comparable missile would be the decommissioned Chinas JL-1 SLBM with a range of less than 2, tactical, short- and medium-range missiles are often collectively referred to as tactical and theatre ballistic missiles, respectively
13.
Cruise missile
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A cruise missile is a guided missile used against terrestrial targets that remains in the atmosphere and flies the major portion of its flight path at approximately constant speed. Cruise missiles are designed to deliver a warhead over long distances with high precision. Modern cruise missiles are capable of travelling at supersonic or high speeds, are self-navigating. The idea of a torpedo was shown in the British 1909 film The Airship Destroyer. In 1916, Lawrence Sperry built and patented an aerial torpedo, a small biplane carrying a TNT charge, a Sperry autopilot, inspired by these experiments, the United States Army developed a similar flying bomb called the Kettering Bug. Germany had also flown trials with remote-controlled aerial gliders built by Siemens-Schuckert beginning in 1916, in the period between the World Wars the United Kingdom developed the Larynx, which underwent a few flight tests in the 1920s. In the Soviet Union, Sergei Korolev headed the GIRD-06 cruise missile project from 1932 to 1939, the 06/III and 06/IV contained gyroscopic guidance systems. The vehicle was designed to boost to 28 km altitude and glide a distance of 280 km, in 1944, Germany deployed the first operational cruise missiles in World War II. The V-1, often called a bomb, contained a gyroscope guidance system and was propelled by a simple pulsejet engine. Accuracy was sufficient only for use against very large targets, while the range of 250 km was significantly lower than that of a bomber carrying the same payload, the main advantages were speed and expendability. The production cost of a V-1 was only a fraction of that of a V-2 supersonic ballistic missile. Unlike the V-2, however, the deployments of the V-1 required stationary launch ramps which were susceptible to bombardment. Immediately after the war the United States Air Force had 21 different guided missile projects, all were cancelled by 1948, except four — the Air Materiel Command BANSHEE, the SM-62 Snark, the SM-64 Navaho, and the MGM-1 Matador. The BANSHEE design was similar to Operation Aphrodite, like Aphrodite, it failed, during the Cold War period both the United States and the Soviet Union experimented further with the concept, deploying early cruise missiles from land, submarines and aircraft. The main outcome of the United States Navy submarine missile project was the SSM-N-8 Regulus missile, the United States Air Forces first operational surface-to-surface missile was the winged, mobile, nuclear-capable MGM-1 Matador, also similar in concept to the V-1. Deployment overseas began in 1954, first to West Germany and later to the Republic of China and this alert was in response to the crisis posed by the Soviet attack on Hungary which suppressed the Hungarian Revolution of 1956. Between 1957 and 1961 the United States followed an ambitious and well-funded program to develop a nuclear-powered cruise missile and it was designed to fly below the enemys radar at speeds above Mach 3 and carry a number of hydrogen bombs that it would drop along its path over enemy territory. Although the concept was sound and the 500 megawatt engine finished a successful test run in 1961
14.
Anti-ship missile
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Anti-ship missiles are guided missiles that are designed for use against ships and large boats. Most anti-ship missiles are of the sea skimming variety, and many use a combination of inertial guidance and active radar homing. A good number of other anti-ship missiles use infrared homing to follow the heat that is emitted by a ship, the first anti-ship missiles, which were developed and built by Nazi Germany, used radio command guidance. A variant of the HS293 had a TV transmitter on board, the bomber carrying it could then fly outside the range of naval AA guns and use TV guidance to lead the missile to its target by radio control. The term surface-to-surface missile is used when appropriate, the longer-range anti-ship missiles are often called anti-ship cruise missiles. A typical abbreviation for the phrase anti-ship missile is ASM, but AShM can also be used to avoid confusion with air-to-surface missiles, anti-submarine missiles, Anti-ship missiles were among the first instances of short-range guided missiles during World War II in 1943–44. These all used radio command-guidance from the bombardiers of the warplanes that launched them, some of these hit and either sank or damaged a number of ships, including warships offshore of amphibious landings on western Italy. These radio-controlled missiles were used successfully until the Allied navies developed missile countermeasures—principally radio jamming, the Allies also developed some of their own similar radio-guided AShMs, starting with the U. S. During the Cold War, the Soviet Union turned to a sea-denial strategy concentrating on submarines, naval mines, one of the first products of the decision was the SS-N-2 Styx missile. Further products were to follow, and they were loaded onto the Soviet Air Forces Tu-95 Bear and Tu-22 Blinder bombers. In 1967, the Israeli Navys destroyer Eilat was the first ship to be sunk by a ship-launched missile – a number of Styx missiles launched by Egyptian Komar-class missile boats off the Sinai Peninsula. In the Indo-Pakistani War of 1971 the Indian Navy conducted two raids using OSA 1-class missile boats employing the Styx on the Pakistani Naval base at Karachi and these raids resulted in the destruction or crippling of approximately two thirds of the Pakistani Navy. Major losses included two destroyers, an oiler, an ammunition ship, approximately a dozen merchant ships. Major shore based facilities, including fuel storage tanks and naval installations were also destroyed, the Osas returned to base without loss. The Battle of Latakia in 1973 was the scene of the worlds first combat between missile boats, in this battle, the Israeli Navy destroyed Syrian warships without suffering any damage, using electronic countermeasures and ruses for defense. Anti-ship missiles were used in the 1982 Falklands War, the British warship HMS Sheffield, a 4,820 ton Type 42 Destroyer, was struck by a single air-launched Exocet AShM, she later sank as a result of the damage that she sustained. The container ship Atlantic Conveyor was also sunk by an Exocet, in 1987, a US Navy guided-missile frigate, the USS Stark, was hit by an Exocet anti-ship missile fired by an Iraqi Mirage F-1 fighter plane. Stark was damaged, but she was able to steam to a port for temporary repairs
15.
Anti-tank missile
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An anti-tank missile, anti-tank guided missile, anti-tank guided weapon or anti-armor guided weapon, is a guided missile primarily designed to hit and destroy heavily armored military vehicles. Germany developed a design for a wire-guided anti tank missile derived from the Ruhrstahl X-4 air to air missile concept in the months of World War II. Reliable information for this weapon is elusive and it was never used in combat and allegedly had serious guidance to target issues. The SS.10 is the first anti-tank missile widely used and it entered service in the French Army in 1955. It was also the first anti-tank missile used by the US Army, the Malkara missile was one of the earliest anti-tank guided missiles. It was jointly developed by Australia and the United Kingdom between 1951 and 1954, and was in service from 1958 until gradually replaced by the Vickers Vigilant missile in the late 1960s. It was intended to be enough to deploy with airborne forces. First-generation manually command guided MCLOS missiles require input from an operator using a joystick or similar device to steer the missile to the target, the disadvantage is that the operator must keep the sights cross hairs on the target and then steer the missile into the cross hairs—i. e. To do this, the operator must be trained and must remain stationary. Because of this, the operator is vulnerable while guiding the missile, the first system to become operational and to see combat was the French Nord SS.10 during the early 1950s. Second-generation semi-automatically command guided SACLOS missiles require the operator to keep the sights on the target until impact. Automatic guidance commands are sent to the missile through wires or radio, examples are the Russian 9M133 Kornet, Israeli LAHAT and the American Hellfire I missiles. Again, the operator must remain stationary during the missiles flight, third-generation guidance systems rely on a laser, electro-optical imager seeker or a W band radar seeker in the nose of the missile. Once the target is identified, the missile needs no further guidance during flight, it is fire-and-forget, however, fire-and-forget missiles are more subject to electronic countermeasures than MCLOS and SACLOS missiles. Examples include the German PARS3 LR, Spike and the Indian Nag, most modern ATGMs have shaped charge high explosive warheads, designed specifically for penetrating armor. Tandem-charge missiles attempt to defeat ERA protected armor, the small initial charge sets off the ERA while the follow-up main charge attempts to penetrate the main armor. Top-attack weapons such as the Indian Nag, American Javelin and the Swedish Bill are designed to strike vehicles from above, both come with the downside of significant weight and bulk. However, inclusion of armor in older vehicles as a part of re-design is possible
16.
Surface-to-air missile
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A surface-to-air missile, or ground-to-air missile, is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of system, in modern armed forces, missiles have replaced most other forms of dedicated antiaircraft weapons. The first serious attempts at SAM development took place during World War II, further development in the 1940s and 1950s led to the first operational systems being introduced by most major forces during the second half of the 1950s. Smaller systems, suitable for work, evolved through the 1960s and 1970s. The American Nike Ajax was the first operational guided missile SAM system, widely used modern examples include the Patriot and S-300 wide-area systems, SM-6 naval missiles, and short-range man-portable systems like the Stinger and Strela-3. The first known idea for a guided missile was in 1925. A selenium cell was mounted on the tip of each of the rockets four tail fins, when one selenium cell was no longer in the light beam, it would be steered in the opposite direction back into the beam. During World War II, efforts were started to develop surface-to-air missiles as it was considered that flak was of little use against bombers of ever-increasing performance. The lethal radius of a shell is fairly small. Against the Boeing B-17, which operated just within the range of the numerous German eighty-eights flak guns, bombers flying at higher altitudes require larger guns and shells to reach them. This greatly increases the cost of the system, and slows the rate of fire, faster aircraft fly out of range more quickly, reducing the number of rounds fired against them. Against late-war designs like the Boeing B-29 Superfortress or jet-powered designs like the Arado Ar 234, the first serious consideration of a SAM development project was a series of conversations that took place in Germany during 1941. Von Braun became convinced a better solution was a manned rocket interceptor, the directors of the Luftwaffe flak arm were not interested in manned aircraft, and the resulting disagreements between the teams delayed serious consideration of a SAM for two years. None of these saw any real development until 1943, when the first large-scale raids by the Allied air forces started. As the urgency of the problem grew, new designs were added, including Enzian and Rheintochter, in general, these designs could be split into two groups. One set of designs would be boosted to altitude in front of the bombers and these designs included the Feuerlilie, Schmetterling and Enzian. The second group were high-speed missiles, typically supersonic, that flew directly towards their targets from below, both types used radio control for guidance, either by eye, or by comparing the returns of the missile and target on a single radar screen. Development of all systems was carried out at the same time
17.
Anti-ballistic missile
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An anti-ballistic missile is a surface-to-air missile designed to counter ballistic missiles. Ballistic missiles are used to deliver nuclear, chemical, biological or conventional warheads in a flight trajectory. There are only two systems in the world that can intercept ICBMs, besides them, many smaller systems exist, that generally cannot intercept intercontinental strategic missiles, even if within range—an incoming ICBM simply moves too fast for these systems. The Russian A-35 anti-ballistic missile system, used for the defense of Moscow, the currently active system is called A-135. The system uses Gorgon and Gazelle missiles with nuclear warheads to intercept incoming ICBMs, the U. S. Ground-Based Midcourse Defense system has reached initial operational capability. Instead of using a charge, it launches a kinetic projectile. The George W. Bush administration accelerated development and deployment of a proposed in 1998 by the Clinton administration. The system is a purpose test and interception facility in Alaska. President Bush referenced the September 11 attacks in 2001 and the proliferation of ballistic missiles as reasons for missile defense, the current GMD system has the more limited goal of shielding against a limited attack by a rogue state such as North Korea. Israels Arrow 3 system entered service in 2017. It is designed for interception of ballistic missiles during the spaceflight portion of their trajectory. It may also act as an anti-satellite weapon, during 1993, a symposium was held by western European nations to discuss potential future ballistic missile defence programs. In the end, the recommended deployment of early warning. During spring 2006 reports about negotiations between the United States and Poland as well as the Czech Republic were published, the plans propose the installation of a latest generation ABM system with a radar site in the Czech Republic and the launch site in Poland. The system was announced to be aimed against ICBMs from Iran and this caused harsh comments by Russian President Vladimir Putin at the Organization for Security and Co-operation in Europe security conference during spring 2007 in Munich. Other European ministers commented that any change of strategic weapons should be negotiated on NATO level, as of July 2007, a majority of Poles were opposed to hosting a component of the system in Poland. Project 640 had been the PRCs indigenous effort to develop ABM capability, the Academy of Anti-Ballistic Missile & Anti-Satellite was established from 1969 for the purpose of developing Project 640. The project was to involve at least three elements, including the sensors and guidance/command systems, the Fan Ji missile interceptor
18.
Air-to-air missile
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An air-to-air missile is a missile fired from an aircraft for the purpose of destroying another aircraft. AAMs are typically powered by one or more rocket motors, usually solid fueled, ramjet engines, as used on the Meteor are emerging as propulsion that will enable future medium-range missiles to maintain higher average speed across their engagement envelope. Air-to-air missiles are broadly put in two groups, most use infrared guidance and are called heat-seeking missiles. In contrast, medium- or long-range missiles, which fall under the category of beyond visual range missiles, tend to rely upon radar guidance. Some modern ones use inertial guidance and/or mid-course updates to get the missile close enough to use an active homing sensor, the air-to-air missile grew out of the unguided air-to-air rockets used during the First World War. Le Prieur rockets were attached to the struts of biplanes and fired electrically, usually against observation balloons, by such early pilots as Albert Ball. Post-war research led the Royal Air Force to introduce Fairey Fireflash into service in 1955, the US Navy and US Air Force began equipping guided missiles in 1956, deploying the USAFs AIM-4 Falcon and the USNs AIM-7 Sparrow and AIM-9 Sidewinder. The Soviet Air Force introduced its K-5 into service in 1957, as missile systems have continued to advance, modern air warfare consists almost entirely of missile firing. The use of Beyond Visual Range combat became so pervasive in the US that early F-4 variants were armed only with missiles in the 1960s. High casualty rates during the Vietnam War caused the US to reintroduce autocannons and traditional dogfighting tactics, in the Falklands War British Harriers, using AIM-9L missiles were able to defeat faster Argentinian opponents. Since the late 20th century all-aspect heat-seeking designs can lock-on to a target from angles, not just from behind. Other types rely on radar guidance, a conventional explosive blast warhead, fragmentation warhead, or continuous rod warhead is typically used in the attempt to disable or destroy the target aircraft. Warheads are typically detonated by a proximity fuze or by an impact if it scores a direct hit. Less commonly, nuclear warheads have been mounted on a number of air-to-air missile types although these are not known to have ever been used in combat. Guided missiles operate by detecting their target, and then homing in on the target on a collision course, although the missile may use radar or infra-red guidance to home on the target, the launching aircraft may detect and track the target before launch by other means. Radar guidance is used for medium- or long-range missiles, where the infra-red signature of the target would be too faint for an infra-red detector to track. There are three types of radar-guided missile – active, semi-active, and passive. Radar-guided missiles can be countered by rapid maneuvering, deploying chaff or using electronic counter-measures, active radar -guided missiles carry their own radar system to detect and track their target
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Anti-satellite weapon
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Anti-satellite weapons are space weapons designed to incapacitate or destroy satellites for strategic military purposes. The development and design of weapons has followed a number of paths. The initial efforts by the USA and the USSR were using ground-launched missiles from the 1950s, in the late 1950s the U. S. Air Force started a series of advanced strategic missile projects under the designation Weapon System WS-199A. One of the projects studied under the 199A umbrella was Martins Bold Orion air-launched ballistic missile for the B-47 Stratojet, twelve test launches were carried out between 26 May 1958 and 13 October 1959, but these were generally unsuccessful and further work as an ALBM ended. The system was modified with the addition of an Altair upper stage to create an anti-satellite weapon with an 1100-mile range. Only one test flight of the mission was carried out. To record its flight path, the Bold Orion transmitted telemetry to the ground, ejected flares to aid visual tracking, the missile successfully passed within 4 miles of the satellite, which would be suitable for use with a nuclear weapon, but useless for conventional warheads. A similar project carried out under 199A, Lockheeds High Virgo, was initially another ALBM for the B-58 Hustler and it too was adapted for the anti-satellite role, and made an attempted intercept on Explorer 5 on 22 September 1959. However, shortly after launch communications with the missile were lost, in any event, work on the WS-199 projects ended with the start of the GAM-87 Skybolt project. Simultaneous U. S. Navy projects were also abandoned although smaller projects did continue until the early 1970s, further testing of weapons effects was carried out under the DOMINIC I series. An adapted version of the nuclear armed Nike Zeus was used for an ASAT from 1962, another area of research was directed into energy weapons, including a nuclear-explosion powered X-ray laser proposal developed at Lawrence Livermore National Laboratory in 1968. Other research was based on more conventional lasers or masers and developed to include the idea of a satellite with a fixed laser, LLNL continued to consider more edgy technology but their X-ray laser system development was cancelled in 1977. ASATs were generally given low priority until 1982, when information about a successful USSR program became known in the west. A crash program followed, which developed into the Vought ASM-135 ASAT, the system was carried on a modified F-15 Eagle that carried the missile directly under the central line of the plane. The F-15s guidance system was modified for the mission and provided new directional cueing through the pilots head-up display, the first launch of the new anti-satellite missile took place in January 1984. The first, and only, successful interception was on September 13,1985, although successful, the program was cancelled in 1988. On February 21,2008, the U. S. Navy destroyed malfunctioning U. S. spy satellite USA-193 using a ship-fired RIM-161 Standard Missile 3, the origins of the Soviet anti-satellite weapon program are unclear. According to some accounts, Sergei Korolev started some work on the concept in 1956 at his OKB-1, what is certain is that at the beginning of April 1960, Nikita Khrushchev held a meeting at his summer residence in Crimea, discussing an array of defense industry issues
20.
Rocket engine
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A rocket engine is a type of jet engine that uses only stored rocket propellant mass for forming its high speed propulsive jet. Rocket engines are reaction engines, obtaining thrust in accordance with Newtons third law, most rocket engines are internal combustion engines, although non-combusting forms also exist. Vehicles propelled by rocket engines are commonly called rockets, since they need no external material to form their jet, rocket engines can perform in a vacuum and thus can be used to propel spacecraft and ballistic missiles. Compared to other types of jet engines, rocket engines have the highest thrust, are by far the lightest, the ideal exhaust is hydrogen, the lightest of all gases, but chemical rockets produce a mix of heavier species, reducing the exhaust velocity. Rocket engines become more efficient at high velocities, since they do not require an atmosphere, they are well suited for uses at very high altitude and in space. Here, rocket is used as an abbreviation for rocket engine, chemical rockets are powered by exothermic chemical reactions of the propellant. Thermal rockets use a propellant, heated by a power source such as electric or nuclear power. Solid-fuel rockets are chemical rockets which use propellant in a solid state, liquid-propellant rockets use one or more liquid propellants fed from tanks. Hybrid rockets use a propellant in the combustion chamber, to which a second liquid or gas oxidiser or propellant is added to permit combustion. Monopropellant rockets use a single propellant decomposed by a catalyst, the most common monopropellants are hydrazine and hydrogen peroxide. Rocket engines produce thrust by the expulsion of an exhaust fluid which has accelerated to a high speed through a propelling nozzle. The fluid is usually a gas created by high pressure combustion of solid or liquid propellants, consisting of fuel and oxidiser components, within a combustion chamber. The nozzle uses the energy released by expansion of the gas to accelerate the exhaust to very high speed. An alternative to combustion is the rocket, which uses water pressurised by compressed air, carbon dioxide, nitrogen, or manual pumping. Chemical rocket propellants are most commonly used, which undergo exothermic chemical reactions which produce hot gas which is used by a rocket for propulsive purposes. Alternatively, a chemically inert reaction mass can be heated using a power source via a heat exchanger. Solid rocket propellants are prepared as a mixture of fuel and oxidising components called grain, liquid-fuelled rockets force separate fuel and oxidiser components into the combustion chamber, where they mix and burn. Hybrid rocket engines use a combination of solid and liquid or gaseous propellants, both liquid and hybrid rockets use injectors to introduce the propellant into the chamber
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Jet engine
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A jet engine is a reaction engine discharging a fast-moving jet that generates thrust by jet propulsion. This broad definition includes airbreathing jet engines and non-airbreathing jet engines, in general, jet engines are combustion engines. In common parlance, the jet engine loosely refers to an internal combustion airbreathing jet engine. These typically feature an air compressor powered by a turbine. Jet aircraft use such engines for long-distance travel, early jet aircraft used turbojet engines which were relatively inefficient for subsonic flight. Modern subsonic jet aircraft usually use more complex high-bypass turbofan engines and these engines offer high speed and greater fuel efficiency than piston and propeller aeroengines over long distances. Jet engines date back to the invention of the aeolipile before the first century AD and this device directed steam power through two nozzles to cause a sphere to spin rapidly on its axis. So far as is known, it did not supply mechanical power, instead, it was seen as a curiosity. However, although powerful, at reasonable flight speeds rockets are very inefficient. The earliest attempts at airbreathing jet engines were hybrid designs in which a power source first compressed air. In one such system, called a thermojet by Secondo Campini but more commonly, motorjet, examples of this type of design were the Caproni Campini N.1, and the Japanese Tsu-11 engine intended to power Ohka kamikaze planes towards the end of World War II. None were entirely successful and the N.1 ended up being slower than the design with a traditional engine. If aircraft performance were ever to increase beyond such a barrier and this was the motivation behind the development of the gas turbine engine, commonly called a jet engine. The key to a jet engine was the gas turbine. The gas turbine was not an idea developed in the 1930s, the first gas turbine to successfully run self-sustaining was built in 1903 by Norwegian engineer Ægidius Elling. Limitations in design and practical engineering and metallurgy prevented such engines reaching manufacture, the main problems were safety, reliability, weight and, especially, sustained operation. The first patent for using a gas turbine to power an aircraft was filed in 1921 by Frenchman Maxime Guillaume and his engine was an axial-flow turbojet. Alan Arnold Griffith published An Aerodynamic Theory of Turbine Design in 1926 leading to work at the RAE
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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
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Latin
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Latin is a classical language belonging to the Italic branch of the Indo-European languages. The Latin alphabet is derived from the Etruscan and Greek alphabets, Latin was originally spoken in Latium, in the Italian Peninsula. Through the power of the Roman Republic, it became the dominant language, Vulgar Latin developed into the Romance languages, such as Italian, Portuguese, Spanish, French, and Romanian. Latin, Italian and French have contributed many words to the English language, Latin and Ancient Greek roots are used in theology, biology, and medicine. By the late Roman Republic, Old Latin had been standardised into Classical Latin, Vulgar Latin was the colloquial form spoken during the same time and attested in inscriptions and the works of comic playwrights like Plautus and Terence. Late Latin is the language from the 3rd century. Later, Early Modern Latin and Modern Latin evolved, Latin was used as the language of international communication, scholarship, and science until well into the 18th century, when it began to be supplanted by vernaculars. Ecclesiastical Latin remains the language of the Holy See and the Roman Rite of the Catholic Church. Today, many students, scholars and members of the Catholic clergy speak Latin fluently and it is taught in primary, secondary and postsecondary educational institutions around the world. The language has been passed down through various forms, some inscriptions have been published in an internationally agreed, monumental, multivolume series, the Corpus Inscriptionum Latinarum. Authors and publishers vary, but the format is about the same, volumes detailing inscriptions with a critical apparatus stating the provenance, the reading and interpretation of these inscriptions is the subject matter of the field of epigraphy. The works of several hundred ancient authors who wrote in Latin have survived in whole or in part and they are in part the subject matter of the field of classics. The Cat in the Hat, and a book of fairy tales, additional resources include phrasebooks and resources for rendering everyday phrases and concepts into Latin, such as Meissners Latin Phrasebook. The Latin influence in English has been significant at all stages of its insular development. From the 16th to the 18th centuries, English writers cobbled together huge numbers of new words from Latin and Greek words, dubbed inkhorn terms, as if they had spilled from a pot of ink. Many of these words were used once by the author and then forgotten, many of the most common polysyllabic English words are of Latin origin through the medium of Old French. Romance words make respectively 59%, 20% and 14% of English, German and those figures can rise dramatically when only non-compound and non-derived words are included. Accordingly, Romance words make roughly 35% of the vocabulary of Dutch, Roman engineering had the same effect on scientific terminology as a whole
24.
Ammunition
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Ammunition is the general term used for the material fired, scattered, dropped or detonated from any weapon. The term ammunition can be traced back to the mid 17th century, broadly speaking, ammunition refers to both expendable weapons and the component parts of other weapons that create the effect on a target. Nearly all weapons will require some form of ammunition to operate, the word comes from the French la munition, which refers to the material used for war. The terms ammunition and munitions are used interchangeably, although the term munition now usually refers to both the actual weapons system alongside the ammunition required to operate it. The purpose of ammunition is to project a force against a target to have an effect. The most iconic example of ammunition is the cartridge, which all components required to deliver the weapon effect in a single package. Ammunition comes in a range of sizes and types and is often designed to work only in specific weapons systems. However, there are internationally recognized standards for certain types that enable their use across different weapons. There are also types of ammunition that are designed to have a specialized effect on a target, such as armor-piercing shells and tracer ammunition. Ammunition is commonly colored in a manner to assist in the identification. A round is a cartridge containing a projectile, propellant, primer. A shell is a form of ammunition that is fired by a large cannon or artillery piece. Before the mid-19th century, these shells were made of solid materials. However, since that time, they are often filled with high-explosives. A shot refers to a release of a weapons system. This may involve firing just one round or piece of ammunition, a dud refers to loaded ammunition that fails to function as intended, typically failing to detonate on landing. However, it can refer to ammunition that fails to fire inside the weapon, known as a misfire, or when the ammunition only partially functions. Dud ammunition, which is classified as an ordnance, is regarded as highly dangerous
25.
Artillery
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Artillery is a class of large military weapons built to fire munitions far beyond the range and power of infantrys small arms. Early artillery development focused on the ability to breach fortifications, and led to heavy, as technology improved, lighter, more mobile field artillery developed for battlefield use. This development continues today, modern self-propelled artillery vehicles are highly mobile weapons of great versatility providing the largest share of an armys total firepower, in its earliest sense, the word artillery referred to any group of soldiers primarily armed with some form of manufactured weapon or armour. In common speech, the artillery is often used to refer to individual devices, along with their accessories and fittings. However, there is no generally recognised generic term for a gun, howitzer, mortar, and so forth, the United States uses artillery piece, the projectiles fired are typically either shot or shell. Shell is a widely used term for a projectile, which is a component of munitions. By association, artillery may also refer to the arm of service that customarily operates such engines, in the 20th Century technology based target acquisition devices, such as radar, and systems, such as sound ranging and flash spotting, emerged to acquire targets, primarily for artillery. These are usually operated by one or more of the artillery arms, Artillery originated for use against ground targets—against infantry, cavalry and other artillery. An early specialist development was coastal artillery for use against enemy ships, the early 20th Century saw the development of a new class of artillery for use against aircraft, anti-aircraft guns. Artillery is arguably the most lethal form of land-based armament currently employed, the majority of combat deaths in the Napoleonic Wars, World War I, and World War II were caused by artillery. In 1944, Joseph Stalin said in a speech that artillery was the God of War, although not called as such, machines performing the role recognizable as artillery have been employed in warfare since antiquity. The first references in the historical tradition begin at Syracuse in 399 BC. From the Middle Ages through most of the era, artillery pieces on land were moved by horse-drawn gun carriages. In the contemporary era, the artillery and crew rely on wheeled or tracked vehicles as transportation, Artillery used by naval forces has changed significantly also, with missiles replacing guns in surface warfare. The engineering designs of the means of delivery have likewise changed significantly over time, in some armies, the weapon of artillery is the projectile, not the equipment that fires it. The process of delivering fire onto the target is called gunnery, the actions involved in operating the piece are collectively called serving the gun by the detachment or gun crew, constituting either direct or indirect artillery fire. The term gunner is used in armed forces for the soldiers and sailors with the primary function of using artillery. The gunners and their guns are usually grouped in teams called either crews or detachments, several such crews and teams with other functions are combined into a unit of artillery, usually called a battery, although sometimes called a company
26.
Bomb
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A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Bombs have been in use since the 11th century in Song Dynasty China, the term bomb is not usually applied to explosive devices used for civilian purposes such as construction or mining, although the people using the devices may sometimes refer to them as a bomb. The military use of the bomb, or more specifically aerial bomb action, typically refers to airdropped, unpowered explosive weapons most commonly used by air forces. Other military explosive weapons not classified as bombs include grenades, shells, depth charges, warheads when in missiles, in unconventional warfare, other names can refer to a range of offensive weaponry. For instance, in recent Middle Eastern conflicts, bombs called improvised explosive devices have been employed by insurgent fighters to great effectiveness, the word comes from the Latin bombus, which in turn comes from the Greek βόμβος, an onomatopoetic term meaning booming, buzzing. Explosive bombs were used in China in 1221, by a Jin dynasty army against a Song Dynasty city, Bombs built using bamboo tubes appear in the 11th century. Bombs made of cast iron shells packed with explosive gunpowder date to 13th century China, the term was coined for this bomb during a Jin dynasty naval battle of 1231 against the Mongols. When hit, even iron armour was pierced through. The Ming Dynasty text Huolongjing describes the use of gunpowder bombs. During the Mongol invasions of Japan, the Mongols used the explosive thunder-crash bombs against the Japanese, archaeological evidence of the thunder-crash bombs has been discovered in an underwater shipwreck off the shore of Japan by the Kyushu Okinawa Society for Underwater Archaeology. X-rays by Japanese scientists of the excavated shells confirmed that they contained gunpowder, explosive shock waves can cause situations such as body displacement, dismemberment, internal bleeding and ruptured eardrums. Shock waves produced by explosive events have two components, the positive and negative wave. The positive wave shoves outward from the point of detonation, followed by the vacuum space sucking back towards the point of origin as the shock bubble collapses. The greatest defense against shock injuries is distance from the source of shock, as a point of reference, the overpressure at the Oklahoma City bombing was estimated in the range of 28 MPa. A thermal wave is created by the release of heat caused by an explosion. Military bomb tests have documented temperatures of up to 2,480 °C, while capable of inflicting severe to catastrophic burns and causing secondary fires, thermal wave effects are considered very limited in range compared to shock and fragmentation. This would be fatal to humans, as tests have proven. Fragmentation is produced by the acceleration of shattered pieces of bomb casing, the use of fragmentation in bombs dates to the 14th century, and appears in the Ming Dynasty text Huolongjing
27.
Guided bomb
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A guided bomb is a precision-guided munition designed to achieve a smaller Circular error probable. Therefore, with guided weapons, fewer air crews are put at risk, less ordnance spent, the creation of precision-guided munitions resulted in the retroactive renaming of older bombs as unguided bombs or dumb bombs. A guided bomb of a given weight must carry fewer explosives to accommodate the guidance mechanisms, Guided bombs carry a guidance system which is usually monitored and controlled from an external device. The Germans were first to introduce Precision Guided Munitions in combat, using the 1, in addition, the U. S. tested the rocket-propelled Gargoyle, it never entered service. No Japanese remotely guided PGMs ever saw service in World War II, the United States Army Air Forces used similar techniques with Operation Aphrodite, but had few successes, the German Mistel parasite aircraft was no more effective. The U. S. programs restarted in the Korean War, in the 1960s, the electro-optical bomb was reintroduced. They were equipped with cameras and flare sights, by which the bomb would be steered until the flare superimposed the target. The camera bombs transmitted a bombs eye view of the back to a controlling aircraft. An operator in this aircraft then transmitted control signals to steerable fins fitted to the bomb, in World War II, the U. S. National Defense Research Committee developed the VB-6 Felix, which used infrared to home on ships. While it entered production in 1945, it was never employed operationally, all such bombs work in much the same way, relying on the target being illuminated, or painted, by a laser target designator on the ground or on an aircraft. They have the significant disadvantage of not being usable in poor weather where the target illumination cannot be seen, or where it is not possible to get a target designator near the target. The laser designator sends its beam in a series of encrypted pulses so the bomb cannot be confused by an ordinary laser, laser-guided weapons did not become commonplace until the advent of the microchip. They made their debut in Vietnam, where on 13 May 1972 when they were used in the second successful attack on the Thanh Hoa Bridge. This structure had previously been the target of 800 American sorties and was destroyed in each of two successful attacks, the other being on 27 April 1972 using Walleyes. That first mission also had laser-guided weapons, but bad weather prevented their use and they were used, though not on a large scale, by the British forces during the 1982 Falklands War. The first large-scale use of weapons came in 1991 during Operation Desert Storm when they were used by coalition forces against Iraq. Even so, most of the air-dropped ordnance used in war was dumb. Laser-guided weapons were used in large numbers during the 1999 Kosovo War, there are two basic families of laser-guided bombs in American service, the Paveway II and the Paveway III
28.
Gun
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A gun is a normally tubular weapon or other device designed to discharge projectiles or other material. The projectile may be solid, liquid, gas or energy and may be free, as bullets and artillery shells, or captive as with Taser probes. Alternatively, acceleration via electromagnetic field generation may be employed in case the tube may be dispensed with. The first devices identified as guns appeared in China around CE1000, by the 12th century the technology was spreading through the rest of Asia, and into Europe by the 13th century. The origin of the English word gun is considered to derive from the given to a particular historical weapon. Domina Gunilda was the given to a remarkably large ballista. This name in turn may have derived from the Old Norse womans proper name Gunnhildr which combines two Norse words referring to battle, in any case the term gonne or gunne was applied to early hand-held firearms by the late 14th or early 15th century. The first device identified as a gun, a tube that used gunpowder to fire a spear. The Chinese had previously invented gunpowder in the 9th century, the earliest depiction of a gunpowder weapon is the illustration of a fire-lance on a mid-10th century silk banner from Dunhuang. The Dean Shoucheng Lu, an account of the siege of Dean in 1132, in due course, the proportion of saltpeter in the propellant was increased to maximise its explosive power. To better withstand that explosive power, the paper and bamboo of which fire-lance barrels were originally made came to be replaced by metal, and to take full advantage of that power, the shrapnel came to be replaced by projectiles whose size and shape filled the barrel more closely. English Privy Wardrobe accounts list ribaldis, a type of cannon, in the 1340s, the earliest surviving firearm in Europe has been found from Otepää, Estonia and it dates to at least 1396. Around the late 14th century in Europe, smaller and portable hand-held cannons were developed, in the late 15th century the Ottoman empire used firearms as part of its regular infantry. The first successful rapid-fire firearm is the Gatling Gun, invented by Richard Gatling, the worlds first sub-machine gun able to be maneuvered by a single soldier is the MP18.1, invented by Theodor Bergmann. It was introduced into service in 1918 by the German Army during World War I as the weapon of the Stosstruppen. The first assault rifle was introduced during World War II by the Germans and it was the first firearm which bridges the gap between long range rifles, machine guns, and short range sub-machine guns. Since the mid-20th century guns that fire beams of energy rather than solid projectiles have been developed, most guns use compressed gas confined by the barrel to propel the bullet up to high speed, though devices operating in other ways are sometimes called guns. In firearms the high-pressure gas is generated by combustion, usually of gunpowder and this principle is similar to that of internal combustion engines, except that the bullet leaves the barrel, while the piston transfers its motion to other parts and returns down the cylinder
29.
Artillery shell
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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
30.
Mortar bomb
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A mortar is a device that fires projectiles at low velocities and short ranges. The mortar has traditionally used as a weapon to propel explosive mortar bombs in high-arcing ballistic trajectories. The weapon is typically muzzle-loading with a short, often smooth-bore barrel, Modern mortars are light and easily portable. They can be used for fire support with a variety of ammunition. Mortars have been used for hundreds of years, originally in siege warfare, many historians consider the first mortars to have been used at the 1453 siege of Constantinople by Mehmed the Conqueror. A European account of the 1456 siege of Belgrade by Giovanni da Tagliacozzo said that the Ottoman Turks used seven mortars that fired stone shots one Italian mile high. The time of flight of these was long enough that casualties could be avoided by posting observers to give warning of their trajectories. However, earlier mortars were used in Korea in a 1413 naval battle when Korean gunsmiths developed the Wangu, the earliest version of the Wangu dates back to 1407. Choe Hae-san, the son of Choe Mu-seon, is credited with inventing the first Wangu. Early mortars, such as the Pumhart von Steyr, were large and heavy. Simply made, these weapons were no more than iron bowls reminiscent of the kitchen, an early transportable mortar was invented by Baron Menno van Coehoorn. This mortar fired a shell, which had a fuse lit by the hot gases when fired. This innovation was taken up, necessitating a new form of naval ship. Mortars played a significant role in the Venetian conquest of Morea, an early use of these more mobile mortars as field weapons was by British forces in the suppression of the 1719 Jacobite rising at the Battle of Glen Shiel. High angle trajectory mortars held an advantage over standard field guns in the rough terrain of the West Highlands of Scotland. Coehorn-type mortars of approximately 180 pounds weight were used by both sides during the American Civil War and these answered as coehorns, and shells were successfully thrown from them into the trenches of the enemy. The mortar had fallen out of use by the Napoleonic era. The German Army studied the Siege of Port Arthur, where heavy artillery had been unable to destroy defensive structures like barbed wire, the solution they developed was a short-barrelled rifled muzzle-loading mortar called the Minenwerfer, and was built in three sizes
31.
Torpedo
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Historically, it was called an automotive, automobile, locomotive or fish torpedo, colloquially called a fish. The term torpedo was originally employed for a variety of devices, from about 1900, torpedo has been used strictly to designate an underwater self-propelled weapon. Todays torpedoes can be divided into lightweight and heavyweight classes, and into straight-running, autonomous homers and they can be launched from a variety of platforms. The word torpedo comes from the name of a genus of rays in the order Torpediniformes. In naval usage, the American Robert Fulton introduced the name to refer to a gunpowder charge used by his French submarine Nautilus to demonstrate that it could sink warships. The concept of a torpedo existed many centuries before it was successfully developed. In 1275, Hasan al-Rammah described. an egg which moves itself, in modern language, a torpedo is an underwater self-propelled explosive, —but historically, the term also applied to primitive naval mines. These were used on an ad hoc basis during the modern period up to the late 19th century. An early submarine, the Turtle, attempted to lay a bomb with a fuse on the hull of HMS Eagle during the American Revolutionary War. In the early 1800s, the American inventor Robert Fulton, while in France and he coined the term torpedo in reference to the explosive charges he outfitted his submarine Nautilus. However, both the French and the Dutch governments were uninterested in the submarine, Fulton then concentrated on developing the torpedo independent of a submarine deployment. However, the British government refused to purchase the invention, stating they did not wish to introduce into naval warfare a system that would give advantage to weaker maritime nations. Fulton carried out a demonstration for the US government on 20 July 1807. Further development languished as Fulton focused on his steam-boat matters, during the War of 1812, torpedoes were employed in attempts to destroy British vessels and protect American harbors. In fact a submarine deployed torpedo was used in an attempt to destroy HMS Ramillies while in New Londons harbor. Hardy to warn the Americans to cease efforts with the use of any boat in this cruel and unheard-of warfare. Torpedoes were used by the Russian Empire during the Crimean War in 1855 against British warships in the Gulf of Finland and they used an early form of chemical detonator. During the American Civil War, the torpedo was used for what is today called a contact mine
32.
Naval mine
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A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, Naval mines can be used offensively—to hamper enemy shipping movements or lock vessels into a harbour, or defensively—to protect friendly vessels and create safe zones. Mines can be laid in many ways, by purpose-built minelayers, refitted ships, submarines and their flexibility and cost-effectiveness make mines attractive to the less powerful belligerent in asymmetric warfare. The cost of producing and laying a mine is usually anywhere from 0. 5% to 10% of the cost of removing it, parts of some World War II naval minefields still exist because they are too extensive and expensive to clear. It is possible for some of these 1940s-era mines to remain dangerous for many years to come, Mines have been employed as offensive or defensive weapons in rivers, lakes, estuaries, seas, and oceans, but they can also be used as tools of psychological warfare. Offensive mines are placed in enemy waters, outside harbours and across important shipping routes with the aim of sinking both merchant and military vessels. Defensive minefields safeguard key stretches of coast from enemy ships and submarines, forcing them into more easily defended areas, minefields designed for psychological effect are usually placed on trade routes and are used to stop shipping from reaching an enemy nation. They are often spread thinly, to create an impression of minefields existing across large areas, a single mine inserted strategically on a shipping route can stop maritime movements for days while the entire area is swept. International law requires nations to declare when they mine an area, the warnings do not have to be specific, for example, during World War II, Britain declared simply that it had mined the English Channel, North Sea, and French coast. Chinese records tell of naval explosives in the 16th century, used to fight against Japanese pirates and this kind of naval mine was loaded in a wooden box, sealed with putty. General Qi Jiguang made several timed, drifting explosives, to harass Japanese pirate ships, although this is the rotating steel wheellocks first use in naval mines, Jiao Yu had described their use for land mines back in the 14th century. The first plan for a sea mine in the West was by Ralph Rabbards, the Dutch inventor Cornelius Drebbel was employed in the Office of Ordnance by King Charles I of England to make weapons, including a floating petard which proved a failure. Weapons of this type were apparently tried by the English at the Siege of La Rochelle in 1627, American David Bushnell developed the first American naval mine for use against the British in the American War of Independence. It was a watertight keg filled with gunpowder that was floated toward the enemy and it was used on the Delaware River as a drift mine. In 1812 Russian engineer Pavel Shilling exploded a mine using an electrical circuit. Russian naval specialists set more than 1500 naval mines, or infernal machines, designed by Moritz von Jacobi and by Immanuel Nobel, the mining of Vulcan led to the worlds first minesweeping operation. During the next 72 hours,33 mines were swept, the Jacobi mine was designed by German born, Russian engineer Jacobi, in 1853. The mine was tied to the sea bottom by an anchor, a cable connected it to a cell which powered it from the shore
33.
Hand grenade
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A grenade is a small bomb typically thrown by hand. A variety of hand grenades exist, the most common being explosive grenades designed to detonate after impact or after a set amount of time, Grenadiers were originally soldiers who specialized in throwing grenades. The word grenade derives from the French word for an explosive shell. Its first use in English dates from the 1590s and it is likely derived from Old French pomegranate and influenced by Spanish granada, as the fragmenting bomb is reminiscent of the many-seeded fruit. Rudimentary incendiary grenades appeared in the Eastern Roman Empire, not long after the reign of Leo III. Byzantine soldiers learned that Greek fire, a Byzantine invention of the century, could not only be thrown by flamethrowers at the enemy. The use of Greek fire spread to Muslim armies in the Near East, in China, during the Song Dynasty, weapons known as Zhen Tian Lei were created when Chinese soldiers packed gunpowder into ceramic or metal containers. In 1044, a military book Wujing Zongyao described various gunpowder recipes in which one can find, according to Joseph Needham, the Chinese also discovered the explosive potential of packing hollowed-out cannonball shells with gunpowder. The mid-14th-century book Huolongjing, written by Jiao Yu, recorded an earlier Song-era cast iron cannon known as the flying-cloud thunderclap cannon, the manuscript stated that, The shells are made of cast iron, as large as a bowl and shaped like a ball. Inside they contain half a pound of divine fire and they are sent flying towards the enemy camp from an eruptor, and when they get there a sound like a thunder-clap is heard, and flashes of light appear. If ten of these shells are fired successfully into the enemy camp, the first cast iron bombshells and grenades did not appear in Europe until 1467. A hoard of several hundred ceramic greandes were discovered during building works in front of a bastion of the Bavarian City of Ingolstadt. Lots of the grenades obtained their original blackpowder loads and igniters, most probably the grenades were intentially dumped the moat of the bastion before the year 1723. In 1643, it is possible that Grenados were thrown amongst the Welsh at Holt Bridge during the English Civil War and these grenades were not very effective and, as a result, saw little use. Improvised grenades were used from the mid-19th century, being especially useful in trench warfare. In the American Civil War, both sides used hand grenades equipped with a plunger that detonated the device on impact, the Union relied on experimental Ketchum Grenades, which had a tail to ensure that the nose would strike the target and start the fuse. The Confederacy used spherical hand grenades that weighed about six pounds and they also used Rains and Adams grenades, which were similar to the Ketchum in appearance and mechanism. Improvised hand grenades were used to great effect by the Russian defenders of Port Arthur during the Russo-Japanese War
34.
Ballistic trajectory
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A special case of a ballistic trajectory for a rocket is a lofted trajectory, a trajectory with an apogee greater than the minimum-energy trajectory to the same range. In other words, the rocket higher and by doing so it uses more energy to get to the same landing point. This may be done for reasons such as increasing distance to the horizon to give greater viewing/communication range or for changing the angle with which a missile will impact on landing. Lofted trajectories are sometimes used in both missile rocketry and in spaceflight, the following applies for ranges which are small compared to the size of the Earth. For longer ranges see sub-orbital spaceflight, in the equations on this page, the following variables will be used, g, the gravitational acceleration—usually taken to be 9. A ballistic missile is a missile only guided during the brief initial powered phase of flight. These formulae ignore aerodynamic drag and also assume that the area is at uniform height 0. This distance is, d = v 2 g For explicit derivations of these results, the time of flight is the time it takes for the projectile to finish its trajectory. The above results are found in Range of a projectile, the third term is the deviation from traveling in a straight line. The magnitude, | v |, of the velocity of the projectile at distance x is given by | v | = v 2 −2 g x tan θ +2. The magnitude |v| of the velocity is given by | v | = V x 2 + V y 2, here the x-velocity remains constant, it is always equal to v cos θ. The y-velocity can be using the formula v f = v i + a t by setting vi = v sin θ, a = -g. Then, V y = v sin θ − g x v cos θ and | v | =2 +2, the formula above is found by simplifying. This formula allows one to find the angle of launch needed without the restriction of y =0, the tangent of the angle of elevation is proportional to the time since the ball was sent into the air, usually by being struck with a bat. Even when the ball is really descending, near the end of its flight, the player therefore sees it in line with a point ascending vertically from the batsman at constant speed. Finding the place from which the ball appears to rise steadily helps the player to position himself correctly to make the catch, if he is too close to the batsman who has hit the ball, it will appear to rise at an accelerating rate. If he is too far from the batsman, it appear to slow rapidly. Proof Suppose the ball starts with a component of velocity of v y upward
35.
Lift (force)
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A fluid flowing past the surface of a body exerts a force on it. Lift is the component of force that is perpendicular to the oncoming flow direction. It contrasts with the force, which is the component of the surface force parallel to the flow direction. If the fluid is air, the force is called an aerodynamic force, in water, it is called a hydrodynamic force. Lift is also exploited in the world, and even in the plant world by the seeds of certain trees. When an aircraft is flying straight and level most of the lift opposes gravity, however, when an aircraft is climbing, descending, or banking in a turn the lift is tilted with respect to the vertical. Lift may also be entirely downwards in some aerobatic manoeuvres, or on the wing on a racing car, in this last case, the term downforce is often used. Lift may also be horizontal, for instance on a sail on a sailboat. Aerodynamic lift is distinguished from other kinds of lift in fluids, Aerodynamic lift requires relative motion of the fluid which distinguishes it from aerostatic lift or buoyancy lift as used by balloons, blimps, and dirigibles. An airfoil is a shape that is capable of generating significantly more lift than drag. A flat plate can generate lift, but not as much as a streamlined airfoil, there are several ways to explain how an airfoil generates lift. Some are more complicated or more rigorous than others, some have been shown to be incorrect. For example, there are based directly on Newton’s laws of motion. Either can be used to explain lift, an airfoil generates lift by exerting a downward force on the air as it flows past. According to Newtons third law, the air must exert an equal and opposite force on the airfoil, the air flow changes direction as it passes the airfoil and follows a path that is curved downward. According to Newtons second law, this change in flow direction requires a force applied to the air by the airfoil. Then, according to Newtons third law, the air must exert a force on the airfoil. The overall result is that a force, the lift, is generated opposite to the directional change
36.
Nazi Germany
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Nazi Germany is the common English name for the period in German history from 1933 to 1945, when Germany was governed by a dictatorship under the control of Adolf Hitler and the Nazi Party. Under Hitlers rule, Germany was transformed into a fascist state in which the Nazi Party took totalitarian control over all aspects of life. The official name of the state was Deutsches Reich from 1933 to 1943, the period is also known under the names the Third Reich and the National Socialist Period. The Nazi regime came to an end after the Allied Powers defeated Germany in May 1945, Hitler was appointed Chancellor of Germany by the President of the Weimar Republic Paul von Hindenburg on 30 January 1933. The Nazi Party then began to eliminate all opposition and consolidate its power. Hindenburg died on 2 August 1934, and Hitler became dictator of Germany by merging the powers and offices of the Chancellery, a national referendum held 19 August 1934 confirmed Hitler as sole Führer of Germany. All power was centralised in Hitlers person, and his word became above all laws, the government was not a coordinated, co-operating body, but a collection of factions struggling for power and Hitlers favour. In the midst of the Great Depression, the Nazis restored economic stability and ended mass unemployment using heavy military spending, extensive public works were undertaken, including the construction of Autobahnen. The return to economic stability boosted the regimes popularity, racism, especially antisemitism, was a central feature of the regime. The Germanic peoples were considered by the Nazis to be the purest branch of the Aryan race, millions of Jews and other peoples deemed undesirable by the state were murdered in the Holocaust. Opposition to Hitlers rule was ruthlessly suppressed, members of the liberal, socialist, and communist opposition were killed, imprisoned, or exiled. The Christian churches were also oppressed, with many leaders imprisoned, education focused on racial biology, population policy, and fitness for military service. Career and educational opportunities for women were curtailed, recreation and tourism were organised via the Strength Through Joy program, and the 1936 Summer Olympics showcased the Third Reich on the international stage. Propaganda minister Joseph Goebbels made effective use of film, mass rallies, the government controlled artistic expression, promoting specific art forms and banning or discouraging others. Beginning in the late 1930s, Nazi Germany made increasingly aggressive territorial demands and it seized Austria and Czechoslovakia in 1938 and 1939. Hitler made a pact with Joseph Stalin and invaded Poland in September 1939. In alliance with Italy and smaller Axis powers, Germany conquered most of Europe by 1940, reichskommissariats took control of conquered areas, and a German administration was established in what was left of Poland. Jews and others deemed undesirable were imprisoned, murdered in Nazi concentration camps and extermination camps, following the German invasion of the Soviet Union in 1941, the tide gradually turned against the Nazis, who suffered major military defeats in 1943
37.
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
38.
V-1 flying bomb
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The V-1 was developed at Peenemünde Army Research Center by the Nazi German Luftwaffe during the Second World War. During initial development it was known by the codename Cherry Stone, the first V-1 was launched at London on 13 June 1944), one week after the successful Allied landings in Europe. After this, the V-1s were directed at the port of Antwerp and other targets in Belgium, the attacks stopped only a month before the war in Europe ended, when the last launch site in the Low Countries was overrun on 29 March 1945. On 9 November 1939, a proposal for an aircraft carrying a payload of 1,000 kg over a distance of 500 km was forwarded to the RLM. On 31 May, Rudolf Bree of the RLM commented that he saw no chance that the projectile could be deployed in combat conditions, as the proposed remote-control system was seen as a design weakness. Heinrich Koppenberg, the director of Argus, met with Ernst Udet on 6 January 1941 to try to convince him that the development should be continued, despite this, Gosslau was convinced that the basic idea was sound and proceeded to simplify the design. On 22 January 1942, Lusser took up a position with the Fieseler aircraft company and he met with Koppenberg on 27 February and was informed of Gosslaus project. Gosslaus design used two engines, Lusser improved the design to use a single engine. A final proposal for the project was submitted to the Technical Office of the RLM on 5 June and the project was renamed Fi 103, as Fieseler was to be the chief contractor. By 30 August, Fieseler had completed the first fuselage, and the first flight of the Fi 103 V7 took place on 10 December, the V-1 was named by The Reich journalist Hans Schwarz Van Berkl in June 1944 with Hitlers approval. The V-1 was designed under the codename Kirschkern by Lusser and Gosslau, with a fuselage constructed mainly of welded sheet steel, the simple, Argus-built pulsejet engine pulsed 50 times per second, and the characteristic buzzing sound gave rise to the colloquial names buzz bomb or doodlebug. It was known briefly in Germany as Maikäfer and Krähe, ignition of the Argus pulsejet was accomplished using an automotive type spark plug located about 76 cm behind the intake shutters, with current supplied from a portable starting unit. The Argus As 014 could operate at zero airspeed because of the nature of its intake shutters, ramp-launch velocity for an operational V-1 was 580 km/h as it left the end of the launch ramp. Beginning in January 1941, the V-1s pulsejet engine was tested on a variety of craft, including automobiles. The unsuccessful prototype was a version of a Sprengboot, in which a boat loaded with explosives was steered towards a target ship, the Tornado was assembled from surplus seaplane hulls connected in catamaran fashion with a small pilot cabin on the crossbeams. The Tornado prototype was a noisy underperformer and was abandoned in favour of conventional piston engined craft. The engine made its first flight aboard a Gotha Go 145 on 30 April 1941, the V-1 guidance system used a simple autopilot developed by Askania in Berlin to regulate altitude and airspeed. A weighted pendulum system provided fore-and-aft attitude measurement to control pitch, operating power for the gyroscope platform and the flight-control actuators was provided by two large spherical compressed air tanks that also pressurized the fuel tank
39.
Autopilot
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An autopilot is a system used to control the trajectory of an aircraft without constant hands-on control by a human operator being required. The autopilot system on airplanes is sometimes referred to as George. In the early days of aviation, aircraft required the attention of a pilot in order to fly safely. As aircraft range increased allowing flights of many hours, the constant attention led to serious fatigue, an autopilot is designed to perform some of the tasks of the pilot. The first aircraft autopilot was developed by Sperry Corporation in 1912, the autopilot connected a gyroscopic heading indicator and attitude indicator to hydraulically operated elevators and rudder. It permitted the aircraft to fly straight and level on a course without a pilots attention. Lawrence Sperry demonstrated it in 1914 at an aviation safety contest held in Paris, at the contest, Sperry demonstrated the credibility of the invention by flying the aircraft with his hands away from the controls and visible to onlookers of the contest. In 1930, the Royal Aircraft Establishment in the United Kingdom developed an autopilot called a pilots assister that used a gyroscope to move the flight controls. Further development of the autopilot was performed, such as improved control algorithms, also, inclusion of additional instrumentation such as the radio-navigation aids made it possible to fly during night and in bad weather. In 1947 a US Air Force C-54 made a flight, including takeoff and landing. Bill Lear developed his F-5 automatic pilot and automatic control system. In the early 1920s, the Standard Oil tanker J. A, moffet became the first ship to use an autopilot. Not all of the aircraft flying today have an autopilot system. The installation of autopilots in aircraft with more than twenty seats is generally made mandatory by international aviation regulations, there are three levels of control in autopilots for smaller aircraft. A single-axis autopilot controls an aircraft in the roll axis only, such autopilots are also known colloquially as wing levellers, a three-axis autopilot adds control in the yaw axis and is not required in many small aircraft. Autopilots in modern aircraft are three-axis and generally divide a flight into taxi, takeoff, climb, cruise, descent, approach. Autopilots exist that automate all of these phases except taxi. Landing, rollout, and taxi control to the parking position is known as CAT IIIc
40.
Radio control
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Radio control is the use of radio signals to remotely control a device. Radio control is used for control of vehicles from a hand-held radio transmitter. Industrial, military, and scientific research organizations use of radio-controlled vehicles as well. In 1898, at an exhibition at Madison Square Garden, Nikola Tesla demonstrated a small unmanned boat that was radio controlled, John Hays Hammond Jr is regarded as the father of radio control due to experiments as an apprentice of Thomas Edison at the age of twelve. Hammond was a friend of Tesla and they performed experiments together in his lab located in his castle. He learned a great deal from his exposure to Tesla, Tesla was granted a US patent on this invention on July 1,1898. In 1903, the Spanish engineer Leonardo Torres y Quevedo presented the Telekino at the Paris Academy of Science, and was granted a patent in France, Spain, Great Britain and the United States. In 1904, Bat, a Windermere steam launch, was controlled using experimental radio control by its inventor, in 1909 the French inventor Gabet demonstrated what he called his Torpille Radio-Automatique, a radio-controlled torpedo. In 1917, Archibald Low as head of the RFC Experimental Works, was the first person to use radio control successfully on an aircraft, in the 1920s, various radio-controlled ships were used for naval artillery target practice. In 1922, the obsolete, US Navy battleship USS Iowa became the first of these target ships, radio control gear, developed by the radio engineer John Hays Hammond, Jr. was installed before her sinking in gunnery exercise in March 1923. The Soviet Red Army used remotely controlled teletanks during the 1930s in the Winter War against Finland, a teletank is controlled by radio from a control tank at a distance of 500–1,500 m, the two constituting a telemechanical group. There were also remotely controlled cutters and experimental remotely controlled planes in the Red Army, in the 1930s, the United Kingdom developed the radio-controlled Queen Bee, a remotely controlled unmanned Tiger Moth aircraft for a fleets gunnery firing practice. The Queen Bee was superseded by the similarly named Queen Wasp, radio control was further developed during World War II, primarily by the Germans who used it in a number of missile projects. Their main effort was the development of radio-controlled missiles and glide bombs for use against shipping, however, by the end of the war, the Luftwaffe was having similar problems attacking Allied bombers and developed a number of radio command guided anti-aircraft missiles, none of which saw service. After initial successes, the British launched a number of raids to collect the missile radio sets. Jammers were then installed on British ships, and the weapons basically stopped working, the German development teams then turned to wire guidance once they realized what was going on, but the systems were not ready for deployment until the war had already moved to France. The German Kriegsmarine operated FL-Boote which were radio controlled motor boats filled with explosives to attack shipping from 1944. Both the British and US also developed radio control systems for similar tasks, however, no system proved usable in practice, and the one major US effort, Operation Aphrodite, proved to be far more dangerous to its users than to the target
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Radiation
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In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles, Ionizing radiation carries more than 10 eV, which is enough to ionize atoms and molecules, and break chemical bonds. This is an important distinction due to the difference in harmfulness to living organisms. A common source of ionizing radiation is radioactive materials that emit α, β, or γ radiation, consisting of helium nuclei, electrons or positrons, gamma rays, X-rays and the higher energy range of ultraviolet light constitute the ionizing part of the electromagnetic spectrum. The lower-energy, longer-wavelength part of the spectrum including visible light, infrared light, microwaves and this type of radiation only damages cells if the intensity is high enough to cause excessive heating. Ultraviolet radiation has some features of both ionizing and non-ionizing radiation and these properties derive from ultraviolets power to alter chemical bonds, even without having quite enough energy to ionize atoms. The word radiation arises from the phenomenon of waves radiating from a source and this aspect leads to a system of measurements and physical units that are applicable to all types of radiation. This law does not apply close to a source of radiation or for focused beams. Radiation with sufficiently high energy can ionize atoms, that is to say it can knock electrons off atoms, ionization occurs when an electron is stripped from an electron shell of the atom, which leaves the atom with a net positive charge. Because living cells and, more importantly, the DNA in those cells can be damaged by this ionization, thus ionizing radiation is somewhat artificially separated from particle radiation and electromagnetic radiation, simply due to its great potential for biological damage. While an individual cell is made of trillions of atoms, only a fraction of those will be ionized at low to moderate radiation powers. If the source of the radiation is a radioactive material or a nuclear process such as fission or fusion. Particle radiation is subatomic particles accelerated to relativistic speeds by nuclear reactions, because of their momenta they are quite capable of knocking out electrons and ionizing materials, but since most have an electrical charge, they dont have the penetrating power of ionizing radiation. The exception is neutron particles, see below, there are several different kinds of these particles, but the majority are alpha particles, beta particles, neutrons, and protons. Roughly speaking, photons and particles with energies above about 10 electron volts are ionizing, particle radiation from radioactive material or cosmic rays almost invariably carries enough energy to be ionizing. The radiation is invisible and not directly detectable by human senses, as a result, in some cases, it may lead to secondary emission of visible light upon its interaction with matter, as in the case of Cherenkov radiation and radio-luminescence. Ionizing radiation has many uses in medicine, research and construction. Ultraviolet, of wavelengths from 10 nm to 125 nm, ionizes air molecules, causing it to be absorbed by air
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Infrared homing
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Infrared homing is a passive weapon guidance system which uses the infrared light emission from a target to track and follow it. Missiles which use infrared seeking are often referred to as heat-seekers, many objects such as people, vehicle engines and aircraft generate and emit heat, and as such, are especially visible in the infrared wavelengths of light compared to objects in the background. Infrared seekers are passive devices, which, unlike radar, provide no indication that they are tracking a target and this makes them suitable for sneak attacks during visual encounters, or over longer ranges when used with a forward looking infrared system or similar cuing system. This makes heat-seekers extremely deadly, 90% of all United States air combat losses over the past 25 years have been due to infrared-homing missiles and they are, however, subject to a number of simple countermeasures, most notably dropping flares behind the target to provide false heat sources. This only works if the pilot is aware of the missile, the first IR devices were experimented with in the pre-World War II era. During the war, German engineers were working on heat seeking missiles and proximity fuses, truly practical designs did not become possible until the introduction of conical scanning and miniaturized vacuum tubes during the war. These early examples had significant limitations and achieved very low rates in combat during the 1960s. A new generation developed in the 1970s and 80s made great strides, the latest examples from the 1990s and on have the ability to attack targets out of their field of view, behind them, and even pick out vehicles on the ground. The infrared sensor package on the tip or head of a missile is known as the seeker head. The NATO brevity code for an air-to-air infrared-guided missile launch is Fox Two, there was little application at the time, and he allowed his 1904 patent to lapse. Nevertheless, it was used for time by the US Navy as a secure communications system. In 1930 the introduction of the Ag-O-Cs photomultiplier provided the first practical solution to the detection of IR, amplifying the signal emitted by the galena, the photomultiplier produced a useful output that could be used for detection of hot objects at long ranges. This sparked developments in a number of nations, notably the UK, eventually they dissolved the Committee and reformed, leaving Lindemann off the roster, and filling his position with well known radio expert Edward Victor Appleton. In Germany, radar research was not given nearly the same level of support as in the UK, IR research was led primarily by Edgar Kutzscher at the University of Berlin working in concert with AEG. This provided enough light to see the target at short range and these proved largely useless in practice and the pilots complained that the target often only became visible at 200 metres, at which point they would have seen it anyway. Only 15 were built and were removed as German airborne radar systems improved though 1942, AEG had been working with the same systems for use on tanks, and deployed a number of models through the war, with limited production of the FG1250 beginning in 1943. This work culminated in the Zielgerät 1229 Vampir riflescope which was used with the StG44 assault rifle for night use, the devices mentioned previously were all detectors, not seekers. They produce either a signal indicating the direction of the target, or in the case of later devices
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Laser guidance
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Laser guidance directs a robotic system to a target position by means of a laser beam. The laser guidance of a robot is accomplished by projecting a light, image processing. The key idea is to show goal positions to the robot by laser light projection instead of communicating them numerically and this intuitive interface simplifies directing the robot while the visual feedback improves the positioning accuracy and allows for implicit localization. The guidance system may serve also as a mediator for cooperative multiple robots, examples of proof-of-concept experiments of directing a robot by a laser pointer are shown on video. Laser guidance spans areas of robotics, computer vision, user interface, video games, communication, Samsung Electronics Co. Ltd. may have been using this technology in PowerBot robotic vacuum cleaners equipped with Point Cleaning™ function since 2014. According to Samsung. com, PowerBot VR9000 with Point Cleaning™ can be purchased online in the USA since 2015, PowerBot robotic vacuums by Samsung have also been sold on Amazon. com since 2014. Google Inc. applied for a patent with USPTO on using light or laser beam between devices to represent connections and interactions between them. However, no patent was granted to Google on this application, Laser guidance is used by military to guide a missile or other projectile or vehicle to a target by means of a laser beam, e. g. beam riding guidance or semi-active radar homing. This technique is sometimes called SALH, for Semi-Active Laser Homing, with this technique, a laser is kept pointed at the target and the laser radiation bounces off the target and is scattered in all directions. The missile, bomb, etc. is launched or dropped somewhere near the target, while the projectile is in the general area and the laser is kept aimed at the target, the projectile should be guided accurately to the target. However, SALH is not useful against targets that do not reflect much laser energy and this is likely to be widely used by advanced military vehicles in order to make it harder to use laser designators against them and harder to hit them with laser-guided munitions. An obvious circumvention would be to merely aim the laser closer to the target, countermeasures to laser guidance are Laser detection systems, Smoke screen, anti-laser active protection systems. Guidance system Laser rangefinder List of laser articles List of laser applications
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Infantry
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Infantry is the general branch of an army that engages in military combat on foot. As the troops who engage with the enemy in close-ranged combat, infantry units bear the largest brunt of warfare, Infantry can enter and maneuver in terrain that is inaccessible to military vehicles and employ crew-served infantry weapons that provide greater and more sustained firepower. In English, the 16th-century term Infantry describes soldiers who walk to the battlefield, and there engage, fight, the term arose in Sixteenth-Century Spain, which boasted one of the first professional standing armies seen in Europe since the days of Rome. It was common to appoint royal princes to military commands, and the men under them became known as Infanteria. in the Canadian Army, the role of the infantry is to close with, and destroy the enemy. In the U. S. Army, the closes with the enemy, by means of fire and maneuver, in order to destroy or capture him, or to repel his assault by fire, close combat. In the U. S. Marine Corps, the role of the infantry is to locate, close with, and destroy the enemy fire and maneuver. Beginning with the Napoleonic Wars of the early 19th century, artillery has become a dominant force on the battlefield. Since World War I, combat aircraft and armoured vehicles have become dominant. In 20th and 21st century warfare, infantry functions most effectively as part of a combined arms team including artillery, armour, Infantry relies on organized formations to be employed in battle. These have evolved over time, but remain a key element to effective infantry development and deployment, until the end of the 19th century, infantry units were for the most part employed in close formations up until contact with the enemy. This allowed commanders to control of the unit, especially while maneuvering. The development of guns and other weapons with increased firepower forced infantry units to disperse in order to make them less vulnerable to such weapons. This decentralization of command was made possible by improved communications equipment, among the various subtypes of infantry is Medium infantry. This refers to infantry which are heavily armed and armored than heavy infantry. In the early period, medium infantry were largely eliminated due to discontinued use of body armour up until the 20th century. In the United States Army, Stryker Infantry is considered Medium Infantry, since they are heavier than light infantry, Infantry doctrine is the concise expression of how infantry forces contribute to campaigns, major operations, battles, and engagements. It is a guide to action, not a set of hard, doctrine provides a very common frame of reference across the military forces, allowing the infantry to function cooperatively in what are now called combined arms operations. Doctrine helps standardise operations, facilitating readiness by establishing common ways of accomplishing infantry tasks, doctrine links theory, history, experimentation, and practice
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