When did they enter World War 1?

Anonymous

∙ 14y ago

Updated: 8/17/2019

The US was oficcially neautral in world war two until 1917 when they declared war on Germany.

Prior to this the US had supported Britain, despite being officially neutral. This led to Germanys use of unrestricted submarine warfare and the sinking of the Lusitania.

Wiki User

∙ 14y ago

What else can I help you with?

One reason the US did not enter World war 1?

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1914

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yes

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1941

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1918

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1917 smart

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1991

What year did airplanes enter World War 1?