American military technology during World War II US cruisers and battleships had their guns directed using information gathered from the ship's radar. 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,
American propaganda during World War II a positive, morale-boosting manner. Indeed, some government officials found that both newspapers and radio were using uncorroborated news from Vichy France and Tokyo. As in Britain, American propaganda depicted the war as an issue of good versus evil, which allowed the government to encourage its population to fight a "just war," and used themes of resistance in and liberation to the occupied countries. In 1940, even prior to being drawn into World War II, President Roosevelt urged every American to consider the effect if the dictatorships won in Europe and Asia. Precision bombing was praised, exaggerating its accuracy, to convince