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Germany invaded Poland, causing Britain to declare war on Germany two days later.
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Fought by Allied and Axis Powers
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The Japanese launch a surprise attack on the naval base at Pearl Harbor, Hawaii, destroying most of the Pacific fleet. The U.S. responds by declaring war on Japan.
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Japan and the U.S. fight a 3 day naval battle in the Pacific. The U.S. wins, marking a turning point in the war as the Allies gain the upperhand.
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The Allies invade Normandy, France and gain a foothold on the continent, enabling them to liberate Western Europe within 3 months.
