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
American Theater (World War II) West Coast. The wolf pack made plans to bombard targets in California on Christmas Eve of 1941. However, the attack was postponed to December 27 and then canceled due to fears of American reprisal. The Japanese constructed a plan early in the Pacific War to attack the Panama Canal, a vital water passage in Panama, used during World War II primarily for the Allied supply effort. The Japanese attack was never launched due to crippling naval losses at the beginning of conflict with the United States and United Kingdom (See: Aichi M6A). The Imperial Japanese Army launched Project Z (also