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Since the Second World War involved most of the world's nations different combatants entered the war at different points. However, it is generally agreed that the war started on September 1, 1939 with the German invasion of Poland. (Please note that some combatants such as the Japanese had already been fighting in China since 1933.)

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13y ago
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15y ago

September 1st 1939 when Germany invades Poland. Britain & France declare war against Germany on the 3rd September.

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12y ago

September 1st 1939

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13y ago

1939 - 1945

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Q: When did World War 2 officially begin?
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Related questions

How did World War 2 officially begin?

World War begins officially when The Attack on Pearl Harbor happens.


When did World War 2 officially begin in Asia?

07 Dec 1941


What effect did world war 2 have on the southern 1930s?

nothing, because world war 2 did not even officially begin until 1939, and the U.S. did not enter into it until after the December 1941 attack of Pearl Harbor, Hawaii.


World War 2 officially began when Germany did what?

World War 2 officially began when Adolf Hitler sent the Wehrmacht (army) to invade Poland on September 1, 1939.


The Holocaust begin in 1940 after World War 2?

The Holocaust was during World War 2


How did World War 2 end officially?

It ended with the surrender of Japan.


Why did the war begin for World War 2?

because they had 2 start with1 be for 2


When was the last time Italy was on war?

World WAr 2 was the last time Italy was at war officially.


How long was Japan involved in World war 2?

They were officially in World War 2 6 years but they had started warring back in the 1930s.


Why did the World War 2 begin?

World War 2 began when Germany invades Poland in 1939.


Who exactly started world war?

the invasion of Poland by the German nazi party officially started world war 2


What country stayed officially neutral during World War 1 and World War 2?

Switzerland,Sweden and Spain