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After the attack on Pearl Harbor on December 7th 1941, the following day America declared war on Japan and Germany. So they entered the war on December 8th 1941

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Q: Date America joined World War 2?
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Related questions

What date did the US join World War 2?

joined in 1942


What was the date the US joined world war 2?

8 December 1941


What impact did the US have on the World War 1 after they joined?

The Allies, joined by America's less worn-out troops, were able to push Germany back and win World War I.


When the us join the world war 2?

The 8th of December 1941 was the date that the US joined world war 2


What happened to the fighting in France when America joined World War 1?

it ended


Who did US join in World War 2?

The United States of America joined the Allied Nations in World War II.


What was the basic issue that led to the war World War 2?

America joined world war II when peril harbor was bombed by the japanezze


Who helped America in World War 1?

America actually joined in to help it's allies. The United States of America joined with Britain, France and Russia to to fight in World War I.


Who controlled most of Europe when America joined world war 2?

Nazi Germany


Why america joined world war 2?

Because Japan Bombed Pearl Harbor.


Who joined World War II after Dec 7 1941?

The United States of America.


What social evidence influenced America to join World War 2?

America joined because of Pearl Harbor.