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
3 September 1939: France and Britain declared war on Germany
The US entered World War 2 after the Japanese attack on Pearl Harbour on 7 December 1941 and got out after the official surrender of Japan on 2 September 1945.
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September 1, 1939 was the official beginning of World War 2.
Hitler survived world war 1.
On the 1st of September 1939, Germany invaded Poland which was the 'official start' of world war 2.
World War 2's official start date in generally recognized as September 1, 1939 - the day the Germans invaded Poland.
The official start date is 1 September 1939 with the German attack on Poland.
3 September 1939: France and Britain declared war on Germany
Germany invaded Poland on 1 September 1939, which is the official start date of World War 2, not World War 1
When Germany invaded Poland, Britain and France declared war against Germany.
World War 2 was started in 1939
Harry S Truman did NOT start World War 2.
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In World War 2
at the start of world war 2 in 1941