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Dora (artillery)
Schwerer Gustav (English: ''Heavy Gustav'') was a German railway gun. It was developed in the late 1930s by Krupp in Rügenwalde as siege artillery for the explicit purpose of destroying the main forts of the French Maginot Line, the strongest fortifications in existence at the time. The fully assembled gun weighed nearly , and could fire shells weighing to a range of . The gun was designed in preparation for the Battle of France, but was not ready for action when that battle began, and in any case the Wehrmacht's Blitzkrieg offensive through Belgium rapidly outflanked and isolated the Maginot Line's static defences, which were then besieged with more conventional heavy guns until French capitulation. Gustav was later deployed in the Soviet Union during the Battle of Sevastopol, part of Operation Barbarossa, where, among other things, it destroyed a munitions depot located roughly below ground level. The gun was moved to Leningrad, and may have been intended to be used in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nazi Germany
Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was the German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a dictatorship. Under Hitler's rule, Germany quickly became a totalitarian state where nearly all aspects of life were controlled by the government. The Third Reich, meaning "Third Realm" or "Third Empire", alluded to the Nazi claim that Nazi Germany was the successor to the earlier Holy Roman Empire (800–1806) and German Empire (1871–1918). The Third Reich, which Hitler and the Nazis referred to as the Thousand-Year Reich, ended in May 1945 after just 12 years when the Allies defeated Germany, ending World War II in Europe. On 30 January 1933, Hitler was appointed chancellor of Germany, the head of gove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Barbarossa
Operation Barbarossa (german: link=no, Unternehmen Barbarossa; ) was the invasion of the Soviet Union by Nazi Germany and many of its Axis allies, starting on Sunday, 22 June 1941, during the Second World War. The operation, code-named after Frederick Barbarossa ("red beard"), a 12th-century Holy Roman emperor and German king, put into action Nazi Germany's ideological goal of conquering the western Soviet Union to repopulate it with Germans. The German aimed to use some of the conquered people as forced labour for the Axis war effort while acquiring the oil reserves of the Caucasus as well as the agricultural resources of various Soviet territories. Their ultimate goal was to create more (living space) for Germany, and the eventual extermination of the indigenous Slavic peoples by mass deportation to Siberia, Germanisation, enslavement, and genocide. In the two years leading up to the invasion, Nazi Germany and the Soviet Union signed political and economic pacts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proving Ground
A proving ground (US) is an installation or reservation in which technology such as weapons, military tactics and automobile prototypes are experimented with or tested. Proving grounds can be operated by government bodies or civilian industries. They are distinct from military training areas which are run by the military and intended for the routine training and exercising of troops across the terrain. Military and government Germany * Peenemünde Army Research Centre, WW2 guided missile and rocket development and testing centre South Korea * Anheung Proving Ground, Taean County (36.680° 126.200°) * Changwon Proving Ground, Changwon City * Darakdae Proving Ground, Pocheon City Russia/former Soviet Union In Russia, a designated area is usually called a "polygon" ( Полигон). * Kapustin Yar, aerial weapons and rocket test range used by the North Caucasus Military District * Totskoye range, test range in the Urals where nuclear tests were carried out in 1954 * Yakutia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hillersleben
Hillersleben is a village and a former municipality in the Börde district in Saxony-Anhalt, Germany. A large proving ground A proving ground (US) is an installation or reservation in which technology such as weapons, military tactics and automobile prototypes are experimented with or tested. Proving grounds can be operated by government bodies or civilian industries. ... for artillery operated there from 1934 to 1945. Since 1 January 2010, it is part of the municipality Westheide. References Former municipalities in Saxony-Anhalt Börde (district) {{Börde-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adolf Hitler
Adolf Hitler (; 20 April 188930 April 1945) was an Austrian-born German politician who was dictator of Nazi Germany, Germany from 1933 until Death of Adolf Hitler, his death in 1945. Adolf Hitler's rise to power, He rose to power as the leader of the Nazi Party, becoming the Chancellor of Germany, chancellor in 1933 and then taking the title of in 1934. During his dictatorship, he initiated European theatre of World War II, World War II in Europe by invasion of Poland, invading Poland on 1 September 1939. He was closely involved in military operations throughout the war and was central to the perpetration of the Holocaust: the genocide of Holocaust victims, about six million Jews and millions of other victims. Hitler was born in Braunau am Inn in Austria-Hungary and was raised near Linz. He lived in Vienna later in the first decade of the 1900s and moved to Germany in 1913. He was decorated during his Military career of Adolf Hitler, service in the German Army in Worl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reinforced Concrete
Reinforced concrete (RC), also called reinforced cement concrete (RCC) and ferroconcrete, is a composite material in which concrete's relatively low ultimate tensile strength, tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, Prestressed_concrete#Post-tensioned_concrete, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials. In corrosion engineering terms, when designed correctly, the alkalinity of the concrete protects the steel rebar from corrosion. Description Reinforcing schemes are generally designed to resist Tension (physics), tensile Stress (mechanics), stresses in particular regions of the concrete that might cause unacceptable frac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Essen
Essen (; Latin: ''Assindia'') is the central and, after Dortmund, second-largest city of the Ruhr, the largest urban area in Germany. Its population of makes it the fourth-largest city of North Rhine-Westphalia after Cologne, Düsseldorf and Dortmund, as well as the ninth-largest city of Germany. Essen lies in the larger Rhine-Ruhr Metropolitan Region and is part of the cultural area of Rhineland. Because of its central location in the Ruhr, Essen is often regarded as the Ruhr's "secret capital". Two rivers flow through the city: in the north, the Emscher, the Ruhr area's central river, and in the south, the Ruhr River, which is dammed in Essen to form the Lake Baldeney (''Baldeneysee'') and Lake Kettwig (''Kettwiger See'') reservoirs. The central and northern boroughs of Essen historically belong to the Low German ( Westphalian) language area, and the south of the city to the Low Franconian ( Bergish) area (closely related to Dutch). Essen is seat to several of the region' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oberkommando Des Heeres
The (; abbreviated OKH) was the high command of the Army of Nazi Germany. It was founded in 1935 as part of Adolf Hitler's rearmament of Germany. OKH was ''de facto'' the most important unit within the German war planning until the defeat at Moscow in December 1941. During World War II, OKH had the responsibility of strategic planning of Armies and Army Groups. The General Staff of the OKH managed operational matters. Each German Army also had an Army High Command ( or AOK). The Armed Forces High Command () then took over this function for theatres other than the Eastern front. The OKH commander held the title of Commander-in-chief of the Army (). After the Battle of Moscow, the OKH commander Field marshal Walther von Brauchitsch was removed from office, and Hitler appointed himself as Commander-in-Chief of the Army. From 1938, OKH was, together with () and () formally subordinated to the . OKH vs OKW OKH had been independent until February 1938, when Hitler created ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little David
Little David was the nickname of an American 36-inch (914 mm) caliber mortar designed to breach the Siegfried Line and then used for test-firing aerial bombs during World War II. With the same calibre as the British Mallet's Mortar, constructed in May 1857, it is one of the largest-calibre guns ever built, having a larger calibre than both of Germany's Schwerer Gustav and Dora which were railway guns. retrieved 22 February 2013 History The mortar was developed as an extension of a previous proposal to destroy heavy concrete fortifications such as the Siegfried Line with massive plastic explosive charges delivered by rocket or bomb. During a discussion between representatives of the Ballistic Research Laboratory and the Office of the Chief of Ordnance it was suggested that instead of dropping such a charge from an airplane, it could be fired from a mortar. Development began of a 914 mm siege mortar firing a 3,600 lb shell. The mortar's base was a large steel box that was pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mallet's Mortar
Mallet's Mortar was a British shell-firing mortar built for the Crimean War, but never used in combat. The mortar was designed by Robert Mallet and was constructed in separate sections so that it could be transported. Robert Mallet first made his design public in 1854. There was little response from the authorities until Mallet wrote to the then Prime Minister Lord Palmerston in March 1855. Palmerston was taken with the idea and instructed the Board of Ordnance to arrange for the construction of two mortars of Mallet's design. Thames Ironworks and Shipbuilding Company won the contract at a price of £4,300 per mortar. The company's bankruptcy resulted in the work being divided among three firms which managed to deliver the mortars in May 1857. Testing began on 19 October 1857 with further testing on 18 December 1857, 21 July 1858 and 28 of July 1858. Each test was brought to an end by damage to the mortar. A total of 19 rounds were fired with a rate of about four shells an hou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calibre
In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel bore – regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimeters. In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters. For example, a "45 caliber" firearm has a barrel diameter of roughly . Barrel diameters can also be expressed using metric dimensions. For example, a "9 mm pistol" has a barrel diameter of about 9 millimeters. Since metric and US customary units do not convert evenly at this scale, metric conversions of caliber measured in decimal inches are typically approximations of the precise specifications in non-metric units, and vice versa. In a rifled barrel, the distance is measured between opposing lands or between opposing grooves; groove measur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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