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They are NOT considered WWII years. 1939-1945 are considered WWII years, as are 1941-1945. By stretching it, 1937-1945 might be considered WWII "ERA".
1939-1945. U.S. involvement was from the time of the attack on Pearl Harbor, December 7, 1941 until the end of the war in 1945.
1939-1945,America entered in 1941
Of course, from 1941 to 1945.
the us entered the war in 1941 after the Japanese bombed pearl harbor until the end of the war 1945.The U.S. was in WWII from December 8, 1941 (when FDR signed the declaration of war against Japan, and 4 days later Germany declared war on the U.S.) until September 2, 1945 (when Japan signed the Japanese Instrument of Surrender on board the USS Missouri).