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Franklin D. Roosevelt was president during that time.
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World War II was the war that was fought to prevent Hitler, Nazi Germany, and the Axis powers from taking over Europe. It was the deadliest war in history.
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America joined the Second World War shortly after Pearl Harbor and continued to participate until the end of the war.
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Japan bombed a military naval base called Pearl Harbor, which played a huge part in convincing America to enter World War II.
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This marks the beginning of America's involvement in World War II.
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A naval battle between Japan and America. America won decisively.
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Important Soviet victory against Germany
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D-Day was the attack on the beach of Normandy in order to liberate France.
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Truman was president at this time.
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This is the Period in United States history after World War II.
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The Cold War was a war that never got "hot" because no bullets were fired between the United States and Soviet Union. It involved an arms race.
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Harry Truman drops an atomic bomb, codenamed Little Boy, on Hiroshima.
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Harry Truman drops the atomic bomb, codenamed Fat Man on Nagasaki. These bombs were very important in causing Japan to surrender.