|
M21 Mortar Motor Carriage
The M21 Mortar Motor Carriage (MMC) was a self-propelled artillery mount on a half-track chassis used by the United States Army during World War II. It was equipped with an 81 mm M1 mortar and an air-cooled M2 Browning machine gun. It was produced by the White Motor Company in 1944. Only 110 examples were produced. It mainly served on the Western Front in Normandy, and Southern France, and then later in the Ardennes during the Battle of the Bulge. It was deemed to have been outclassed in 1945 when the 81 mm M1 mortar was found to have insufficient power to provide effective artillery support. Development The M4 was developed to meet the need for a specialized mortar carrier based on the M2 Half Track Car, which the M21 soon replaced. The initial M4 was designed to carry a mortar. In emergencies, the mortar could be fired from the vehicle. The improved M4A1 had a reinforced floor so that the mortar could be fired from the vehicle, but the mounting faced to the rear an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ardennes
The Ardennes (french: Ardenne ; nl, Ardennen ; german: Ardennen; wa, Årdene ; lb, Ardennen ), also known as the Ardennes Forest or Forest of Ardennes, is a region of extensive forests, rough terrain, rolling hills and ridges primarily in Belgium and Luxembourg, extending into Germany and France. Geologically, the range is a western extension of the Eifel; both were raised during the Givetian age of the Devonian (382.7 to 387.7 million years ago), as were several other named ranges of the same greater range. The Ardennes proper stretches well into Germany and France (lending its name to the Ardennes department and the former Champagne-Ardenne region) and geologically into the Eifel (the eastern extension of the Ardennes Forest into Bitburg-Prüm, Germany); most of it is in the southeast of Wallonia, the southern and more rural part of Belgium (away from the coastal plain but encompassing more than half of the country's total area). The eastern part of the Ardennes forms the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1st Army (United States)
First Army is the oldest and longest-established field army of the United States Army. It served as a theater army, having seen service in both World War I and World War II, and supplied the US army with soldiers and equipment during the Korean War and the Vietnam war under some of the most famous and distinguished officers of the U.S. Army. It now serves as a mobilization, readiness and training command. History Establishment and World War I The First Army was established on 10 August 1918 as a field army when sufficient American military manpower had arrived on the Western Front during the final months of World War I. The large number of troops assigned to the American Expeditionary Forces (AEF) required the activation of subordinate commands. To fill this need, First Army was the first of three field armies established under the AEF. The first commander was General John J. Pershing, who also served as Commander-in-Chief (C-in-C) of the AEF. The headquarters planned an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Third Army (United States)
The United States Army Central, formerly the Third United States Army, commonly referred to as the Third Army and as ARCENT, is a military formation of the United States Army which saw service in World War I and World War II, in the 1991 Gulf War, and in the coalition occupation of Iraq. It is best known for its campaigns in World War II under the command of General George S. Patton. Third Army is headquartered at Shaw Air Force Base, South Carolina with a forward element at Camp Arifjan, Kuwait. It serves as the echelon above corps for the Army component of CENTCOM, US Central Command, whose area of responsibility (AOR) includes Southwest Asia, some 20 countries of the world, in Africa, Asia, and the Persian Gulf. Activation and World War I The Third United States Army was first activated as a formation during the First World War on 7 November 1918, at Chaumont, France, when the General Headquarters of the American Expeditionary Forces (AEF) issued General Order 198 organi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Allied Invasion Of Germany
The Western Allied invasion of Germany was coordinated by the Allies of World War II, Western Allies during the final months of hostilities in the European theatre of World War II, European theatre of World War II. In preparation for the Allied invasion of Nazi Germany, Germany east of the Rhine River, Rhine, a series of offensive operations were designed to seize and capture the east and west bank of the Rhine: Operation Veritable and Operation Grenade in February 1945, and Operation Lumberjack and Operation Undertone in March 1945, these are considered separate from the main invasion operation. The Allied invasion of Germany east of the Rhine started with the Western Allies crossing the river on 22 March 1945 before fanning out and overrunning all of western Germany from the Baltic Sea, Baltic in the north to the Principal passes of the Alps, Alpine passes in the south, where they linked up with troops of the United States Army North, U.S. Fifth Army in Italy.On 3 May the 85th a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Market Garden
Operation Market Garden was an Allies of World War II, Allied military operation during the World War II, Second World War fought in the Netherlands from 17 to 27 September 1944. Its objective was to create a Salient (military), salient into German territory with a bridgehead over the River Rhine, creating an Allies of World War II, Allied invasion route into northern Germany. This was to be achieved by two sub-operations: seizing nine bridges with combined U.S. and British airborne forces (Market) followed by land forces swiftly following over the bridges (Garden). The airborne operation was planned and undertaken by the First Allied Airborne Army with the land operation by XXX Corps (United Kingdom), XXX Corps of the Second Army (United Kingdom), British Second Army.The Battle for the Rhine 1944 by Robin Neillands, Chapter 4 The Road to Arnhem Although the largest airborne operation of the war up to that point, Market Garden's ultimate outcome remains debated: The operation s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of Belgium
The invasion of Belgium or Belgian campaign (10–28 May 1940), often referred to within Belgium as the 18 Days' Campaign (french: Campagne des 18 jours, nl, Achttiendaagse Veldtocht), formed part of the greater Battle of France, an Military offensive, offensive campaign by Nazi Germany, Germany during the World War II, Second World War. It took place over 18 days in May 1940 and ended with the German occupation of Belgium following the surrender of the Belgian Land Component, Belgian Army. On 10 May 1940, Germany Invasion of Luxembourg, invaded Luxembourg, Battle of the Netherlands, the Netherlands, and Belgium under the operational plan ''Manstein Plan, Fall Gelb'' (Case Yellow). The Allied armies Dyle Plan, attempted to halt the German Army in Belgium, believing it to be the main German thrust. After the French had fully committed the best of the Allies of World War II, Allied armies to Belgium between 10 and 12 May, the Germans enacted the second phase of their operation, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power-to-weight Ratio
Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of actual performance of any engine or power source. It is also used as a measurement of performance of a vehicle as a whole, with the engine's power output being divided by the weight (or mass) of the vehicle, to give a metric that is independent of the vehicle's size. Power-to-weight is often quoted by manufacturers at the peak value, but the actual value may vary in use and variations will affect performance. The inverse of power-to-weight, weight-to-power ratio (power loading) is a calculation commonly applied to aircraft, cars, and vehicles in general, to enable the comparison of one vehicle's performance to another. Power-to-weight ratio is equal to thrust per unit mass multiplied by the velocity of any vehicle. Power-to-weight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertical Volute Spring Suspension
The vertical volute spring suspension system is a type of vehicle suspension system. This type of the suspension system was mainly fitted on US and Italian tanks and armored fighting vehicles starting from throughout the 1930s up until after the end of the Second World War in 1945. Development During the 1930s, many innovations in the components of light tanks would make US tanks considerably more reliable. These included rubber-bushed tracks, rear mounted radial engines and the vertical volute spring suspension. A volute spring is a compression spring in the form of a cone (a volute). Under compression the coils slide over each other, affording longer travel. The result is more stable and powerful than any leaf, coil, or torsion bar spring in the same volume. Mounted vertically in a road wheel bogie for a pair of road wheels on a tank made a very compact unit. The Rock Island Arsenal produced a small tank for the cavalry which used vertical volute spring suspension instead of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M3 Half-track
The M3 half-track was an American armored personnel carrier half-track widely used by the Allies during World War II and in the Cold War. Derived from the M2 half-track car, the M3 was extensively produced, with about 15,000 standard M3s and more than 38,000 variant units manufactured. The M3 was extensively modified with several dozen variant designs produced for different purposes. During World War II, the M3 and its variants were supplied to the U.S. Army and Marines, as well as British Commonwealth and Soviet Red Army forces, serving on all major fronts throughout the war. The M3 and its variants were produced by many manufacturers including Diamond T, White Motor Company, and Autocar. They were adapted for a wide variety of uses, such as a self-propelled anti-aircraft weapon or self-propelled artillery. Although initially unpopular due to its lack of significant armor or a roof to protect the crew from shrapnel, it was used by most of the Allies during the war. In the Cold ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caliber
In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms) , 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 millimetres, 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 rifling , rifled barrel, the distance is measured between opposing Rifling#C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M3 Half-track
The M3 half-track was an American armored personnel carrier half-track widely used by the Allies during World War II and in the Cold War. Derived from the M2 half-track car, the M3 was extensively produced, with about 15,000 standard M3s and more than 38,000 variant units manufactured. The M3 was extensively modified with several dozen variant designs produced for different purposes. During World War II, the M3 and its variants were supplied to the U.S. Army and Marines, as well as British Commonwealth and Soviet Red Army forces, serving on all major fronts throughout the war. The M3 and its variants were produced by many manufacturers including Diamond T, White Motor Company, and Autocar. They were adapted for a wide variety of uses, such as a self-propelled anti-aircraft weapon or self-propelled artillery. Although initially unpopular due to its lack of significant armor or a roof to protect the crew from shrapnel, it was used by most of the Allies during the war. In the Cold ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.png "Click for more on -> Vertical Volute Spring Suspension")
