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They didn't have to. On 11 December 1941, Germany declared war on the United States and immediately started attacking US shipping.

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Q: When did the us declare war in Europe in World War 2?
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Continue Learning about General History

Can japan declare war after world war 2?

Any country can declare war on anybody else. What matters is can you back it up?


During World War 1 when did Serbia declare war?

an act of terrorism


What year did America declare war on Germany in world war 1?

1917


Who did the US declare war on when they entered World War 2?

The United States was bombed by the Japanese at Pearl Harbor which cause a declaration of war but Germany had an alliance with Japan and it had forced the United States to declare war on Germany too. Then Germany had an alliance with Italy which cause the United States to declare war on yet another country. Then the world was at war and therefore World War 2 started.


Where did Neville Chamberlain declare war with Germany in World War 2?

Great Britian

Related questions

What impact did Serbia's sense of nationalism have on tension in Europe prior to World War I?

it caused Serbia to declare war on Austria Hungary


What impact did Serbia's sense of nationalism have on tensions in Europe prior to World War I?

it caused Serbia to declare war on austria hungary


What was happening in Europe that caused the US to declare war on Germany?

The US did not declare war on Germany. Germany declared war on the US shortly after the Japanese attack on Hawaii.


Did Britain declare war on Germany in World War 1 or World War 2?

In both.


When did Hitler REALLY declare war?

This is a really odd question as it assumes that most historians give bogus dates for the start of World War 2 in Europe.


Did the US declare any war after World War 2?

No.


Did Poland declare war on Germany in World War 2?

no


Who did the us declare war on in World War 1?

germany


Can japan declare war after world war 2?

Any country can declare war on anybody else. What matters is can you back it up?


Who was first to declare war World War 1?

Austria-Hungary.


Why did the us declare war in world war 2?

Pearl Harbour.


Did Slovenia declare war on Germany in World War 2?

yes