United States Involvement in World War II By sluna002 Dec 7, 1941 Japan attacks Pearl Harbor Dec 8, 1941 FDR asks Congress for a declaration of war against Japan Jun 1, 1942 Battle of Midway in the Pacific Feb 1, 1943 Island hopping strategy in the Pacific begins in Guadalcanal, in the Solomon Islands of the South Pacific Jun 6, 1944 D-day Invasion in Normandy Mar 1, 1945 American bombers destroy buildings, resulting in casualties, in the Tokyo Bombing Raid Jul 1, 1945 General MacArthur retakes the Philippines Aug 6, 1945 Atomic bomb is dropped in Hiroshima Aug 9, 1945 Atomic bomb is dropped in Nagasaki Sep 2, 1945 Japan surrenders!