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Germany and the Soviet Union sign the Nazi-Soviet Non-Aggression Pact
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Germany invades Poland, starting World War 2
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Britain and France declare war on Germany
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Germany invades France, Belgium, and the Netherlands
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Italy declares war on France and Great Britain
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Germany invades the Soviet Union (Operation Barbarossa)
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The Japanese launch a sneak attack on Pearl Harbor, Hawaii
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Germany and Italy declare war on the United States; then the United States declares war on Germany and Italy
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Roosevelt issues Executive Order 9066
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The Allies invade North Africa
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The Germans surrender at Stalingrad, Soviet Union
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Italy surrenders
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D-Day
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The United States drops the first atomic bomb on Hiroshima, Japan
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The United States drops a second atomic bomb on Nagasaki, Japan