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The USA joined in the war because the USA was part of the Triple alliance in the first place, and after Germany attacked the USA's submarines and battleships, they then joined the war in 1917.

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Q: Why did US enter the world war 1 and when did they enter?
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Related questions

One reason the US did not enter World war 1?

The US did enter World War 1, though not till 1917.


Was it a good decision for the US to enter the World War 1?

no


When did the US enter world war 1 and 2?

1941


What did us enter the world war 1?

1917 smart


What year did thew US enter world war 1?

1914


What were the years of World War 1 and when did the us enter?

It started in 1914


In what year did the US enter World War 1 in Europe?

1917


What side did the US enter World War 1 on?

Britain's side


What finally causes the us to enter World War 1?

The Jews


What events led the US to enter world war 1 1?

by Gerrnan submarine


Was the bombing of Pearl Harbor the event to provoke the US to enter World War I?

No, World War 1 ended in 1918 and the attack on Pearl Harbor was on December 7, 1941. Pearl Harbor was the event that provoked the US to enter World War 2, not 1.


What US sinking ships sealed the US decision to enter world war 1?

The Titanic