The US entered WW1 in 1917. The US entered WW2 in 1941.
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The United States was the country that entered World War 1 late. The war was fought from 1914 to 1918.
It was fought in more than one country. Bosnia-herzegovina, Austria,Germany, France, and Belgium mostly
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After World War I, the United States of America emerged as the richest country in the world. The war was fought between 1914 and 1918.
The War was fought from 1914 to 1918.