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The U.S. Entered the war and declared war on Germany in 1917 and the war ended at 1918

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15y ago
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Brianne Roane

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2y ago

About three years. the war was from 1914 to 1918 and the USA joined one year before it ended . the war had lasted about 4 years and 105 days .

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Q: How long was world war 1 going on before the US declared war?
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