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
German military administration in occupied France during World War II restrictions of the Armistice (including a heavy tribute) and economical dependency on Germany. It constituted a land area of 246,618 square kilometres, approximately 45 percent of France, and included approximately 33 percent of the total French labor force. The demarcation line between the free zone and the occupied zone was a de facto border, necessitating special authorisation and a laissez-passer from the German authorities to cross. These restrictions remained in place after Vichy was occupied and the zone renamed "zone sud" ("south zone"), and also placed under military administration in November 1942. The Italian occupation zone consisted of small areas