American military technology during World War II American military technology during World War II American military technologies developed during World War II became more advanced and specialized as the war progressed. The technologies produced ranged in complexity from relatively simple items such as small arms and armored vehicles, including tanks, to more complex items such as the atomic bomb. The latter, produced under the secretive Manhattan Project, proved to be an incredibly powerful weapon that revolutionized warfare and was used to end the war. Other technologies, such as the M4 Sherman tank, the M1 Garand and M1 Carbine, and the gas mask, were refinements on previously existing
German tanks in World War II keep pace with Soviet T-34 and KV tanks, which respectively, either had sloped armor or relatively thick armor and both shared 76 mm guns. By 1941, the Panzer III was the most numerous of German tank designs, however, during the later parts of 1943, it was largely replaced by later versions of the Panzer IV and Panzer V "Panther". Its assault gun chassis variant, the Sturmgeschütz III was, with just over 9,400 units built, the most widely produced German armored fighting vehicle of World War II. The Panzer IV was the workhorse of the German tank force during World War