Answer:
WW2 started September 1st 1939, and it ended September 2nd 1945. This began when Germany invaded Poland. This was a brutal war won by allied forces, Great Britain, US, and the Soviet Union against the Axis powers of Nazi Germany, Japan, and Italy. WW2 was a mass human killing, especially in the Holocaust, and the first use of an atomic bomb
Step-by-step explanation:
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