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Wars don't work like that. There was nobody standing on the German-Polish border with with a starting pistol who said: 'I hereby declare World War 2 started! No arguing! It's official. No foul play! I hope the most deserving chap wins.' Probably the most commonly given date is 3 September 1939, when Britain and France declared war on Germany.
September 1, 1939

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11y ago

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