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World War II begins when Germany invades Poland in a blitzkrieg. England and France react by declaring war on Germany. https://www.nationalgeographic.com/pearlharbor/history/wwii_timeline.html
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Japanese troops begin to occupy the French colony of Indochina.
The United States cuts off oil exports to Japan. -
Japanese Admiral Isoroku Yamamoto begins planning an air attack on Pearl Harbor.
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Japanese Army and Navy officers say Japan should “get ready for war” against the United States.
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America joins the war.
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Atomic bombs are dropped on Hiroshima (August 6) and Nagasaki (August 9).
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Japanese officials sign the surrender document.