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France and Great Britain guarantee the integrity of the borders of the Polish state.
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Germany invades Poland.
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Honoring their guarantee of Poland’s borders, Great Britain and France declare war on Germany.
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Germany invades Denmark and Norway. Denmark surrenders on the day of the attack and Norway holds out until June 9.
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Germany attacks western Europe. Soon after, France signs an armistice agreement allowing the Germans occupy the northern half of the country and the entire Atlantic coastline.
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Japan bombs Pearl Harbor.
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The Pearl Harbor bombing was the driving factor of America declaring war on Japan.
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Nazi Germany and its Axis partners declare war on the United States.
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Axis forces in Tunisia surrender to the Allies, ending the North African campaign.
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British and US troops successfully land on the Normandy beaches of France, opening a “Second Front” against the Germans
