![]() ![]() ![]() Both the tank and field guns fired the same range of 75x350R ammunition. ![]() The 75mm tank gun has its origins in the famous French Canon de 75 modèle 1897 field gun of World War I fame which was also adopted by the United States and used well into World War II as the 75mm M1897 field gun. M2 75 mm gun as mounted in medium tank M3 If enemy tanks were encountered in numbers, specialist Tank Destroyer units were to be called in. The tank was not supposed to engage enemy tanks. For this role the tank gun required good general-purpose performance but anti-tank capability was not paramount. The main gun was seen as a means of overcoming obstacles as the tank proceeded to attack vital enemy rear areas. The tank's primary armament was seen as its machine guns and sheer bulk and crushing power. The tank's job was to pour through a breach in the enemy front line created by infantry and artillery and exploit that breach by attacking the enemy rear. armored doctrine in World War II saw the tank as a deep-attack or exploitation vehicle. ![]() The designations bore only an approximate relationship to the actual weight of the projectile when it was applied to modern artillery.U.S. The 18th century standards were based on projectile weight, and dated back to use of muzzle loaded cannons which fired solid cannonballs. This system has largely been replaced by defining the weapon in terms of the measurement of the calibre, which is the standard today for most weapon systems in use by the world's armed forces. The British standard ordnance weights and measurements for the artillery were established by the Master General of Ordnance in 1764, and these were not altered until 1919, when the metric system was additionally introduced. ![]()
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