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During World War I, the United States joined the allies because its neutrality had been violated by Germany -- the leading nation among the "Central Powers," against which the Triple Alliance was fighting. In addition, sympathy in America had largely already moved in the direction of the allies because of the close ties between many Americans and Great Britain.

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10y ago
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12y ago

They finally joined the allies when Japan attacked America at Pearl Harbour,when America did nothing to provoke them except offering them a peace agreement

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13y ago

The Japanese attack on Pearl Harbor.

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Q: Why did the US decide to join the allies?
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Related questions

Did the US join the Axis or Allies?

USA was on the Allies.


Why did the us decide not to join war in 1914?

did us join war in1914 yes or no


What caused the US to join the allies in fighting?

Pearl Harbor


What side did the US join on the world war 2?

The Allies


What cause the US to join the allies in World War 1?

yo face


Did the US join the allies after Germany bombed Peal Harbor?

Japan bombed Pearl Harbour


Did any country attack the US before you joined World War 1?

No country attacked the US before they joined WW1, but the US's allies such as France and Britain were attacked and at war with Germany, so the US decided to support their allies and join the war. The sinking of the British/ American ship "The Lusitania" was a trigger for the US to join the war.


Was it a good idea for US to join world war 2?

Yes, because our allies were getting badly attacked, and if we didn't help them, later on in another war, our allies wouldn't help us. And secondly, the Japanese bombed us, so that gave the United States a good reason to join WWII.


Why did turkey turn yellow quit the Axis and join the Allies?

because the allies were more equipped during the end of the war and the US had the biggest army so that might be why


How did the germans prepare for war?

after world war one the allies put how big there battle ships and military vehicles could be. The allies or the us did not join because they thought they war peace full but the British were allies with the French when Hitler declared on France UK had to join. They were already damaged world war one but the America wasn't. The main reason we joined the war is because the Japanese attacked us and they were allies with Germany


What threat encouraged the us to join the allies in World War I?

I honestly dont know. We will do further research into the topic. ;)


Why did the US eventually join the allies in World War 1?

it finally realized what Germany was doing and the central powers were fighting for