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Japan invades Manchuria the first act of world war 2
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Fascist Italy invades, conquers, and annexes Ethiopia.
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Nazi Germany and Fascist Italy sign a treaty of cooperation on October 25; on November 1, the Rome-Berlin Axis is announced.
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Japan invades China, initiating World War II in the Pacific.
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The Soviet Union invades Poland from the east.
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Warsaw surrenders on September 27. The Polish government flees into exile via Romania. Germany and the Soviet Union divide Poland between them.
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Germany invades Denmark and Norway. Denmark surrenders on the day of the attack; Norway holds out until June 9.
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Italy enters the war. Italy invades southern France on June 21.
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Germany, Italy, Hungary, and Bulgaria invade and dismember Yugoslavia. Yugoslavia surrenders on April 17. Germany and Bulgaria invade Greece in support of the Italians. Resistance in Greece ceases in early June 1941.
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Japan bombs Pearl Harbor.
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Having agreed in principle to unconditional surrender on August 14, 1945, Japan formally surrenders, ending World War II.