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World War 2 began when Germany invaded Poland
https://www.history.com/topics/world-war-ii/world-war-ii-history -
The U.S. joined World War 2 after Pearl Harbor was bombed.
https://www.history.com/topics/world-war-ii/pearl-harbor -
The U.S. invades the beaches of Normandy.https://www.history.com/this-day-in-history/d-day
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FDR passes away and Truman becomes president in the middle of World War 2.https://www.history.com/this-day-in-history/fdr-dies
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The Allies win World War 2.https://www.historynet.com/allies-won-world-war-ii.htm
