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There were many. one may have been the surprise attack at Pearl Harbor. Another may have been the fall of France, or the Blitzkrieg in Poland. It could also have been the nuking of Hiroshima and Nagasaki.

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βˆ™ 14y ago
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βˆ™ 13y ago

the German invasion of Poland was the final catalyst to the beginning of ww2

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βˆ™ 11y ago

The German invasion of Poland on 1 September 1939

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βˆ™ 14y ago

The Japanese attack upon Pearl Harbor and Hitler's declaration of war on the US .

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βˆ™ 12y ago

The German invasion of Poland.

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Q: What event finally unleashed world war ii?
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