U.S. Involvement in World War II

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Cause for U.S. entry into WWII.

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December 7, 1941, Pearl Harbor attack.

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Pearl Harbor

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attack on U.S. naval base in Hawaii

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D-Day

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June 6, 1944, Allied invasion of Normandy

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Manhattan Project

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U.S. project to develop atomic bomb

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Hiroshima and Nagasaki

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where U.S. dropped atomic bombs in August 1945

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President during most of WWII

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Franklin D. Roosevelt

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President who authorized atomic bombings

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Harry S. Truman

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Lend-Lease Act

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U.S. aid to Allies before entering WWII

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Battle of Midway

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first major battle in the Pacific, June 1942

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Rosie the Riveter

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symbol of American women in workforce