Military history of the United States during World War II Military history of the United States during World War II The military history of the United States in World War II covers the war against Germany, Italy, and Japan, starting with the 7 December 1941 attack on Pearl Harbor. During the first two years of World War II, the United States had maintained formal neutrality as made official in the Quarantine Speech delivered by U.S. President Franklin D. Roosevelt in 1937, while supplying Britain, the Soviet Union, and China with war materiel through the Lend-Lease Act which was signed into law on 11 March 1941, as well as deploying the
Military equipment of Sweden during World War II full payload. Number of bombers pre-war: 88 Number of bombers in 1939: 116 Number of bombers in 1940: 276 Number of bombers in 1941: 346 Number of bombers in 1942: 534 Number of bombers in 1943: 743 Number of bombers in 1944: 775 Number of bombers in 1945: 879 Military equipment of Sweden during World War II Sweden was formally a non-belligerent nation throughout World War II, but saw considerable military build-up as the level of threat from the Soviet Union or Nazi Germany increased. Between 10,000 and 20,000 Swedes fought as volunteers abroad, a majority of them in service