<P> The United States joined World War I in April 1917 on the side of the Triple Entente ( British Empire , France , and Russia ) . Because of the necessary period of training before the units were moved overseas , the first elements of the American Expeditionary Forces arrived in June 1917 . Their first actions of the Western Front came in October 1917 . U.S. troops contributed to the offensive that finally broke through the German lines . With the armistice on 11 November 1918 , the Army once again decreased its forces . </P>
<P> The United States joined World War I in April 1917 on the side of the Triple Entente ( British Empire , France , and Russia ) . Because of the necessary period of training before the units were moved overseas , the first elements of the American Expeditionary Forces arrived in June 1917 . Their first actions of the Western Front came in October 1917 . U.S. troops contributed to the offensive that finally broke through the German lines . With the armistice on 11 November 1918 , the Army once again decreased its forces . </P>
when did the us begin sending large numbers of troops to join world war i in europe
when did the us begin sending large numbers of troops to join world war i in europe
June 1917
June 1917