<P> The American Expeditionary Forces ( A.E.F. , A.E.F. or AEF ) was a formation of the United States Army on the Western Front of World War I . The AEF was established on July 5 , 1917 , in France under the command of Gen. John J. Pershing . It fought alongside French Army , British Army , Canadian Army , and Australian Army units against the German Empire . A minority of the AEF troops also fought alongside Italian Army units in that same year against the Austro - Hungarian Army . The AEF helped the French Army on the Western Front during the Aisne Offensive ( at the Battle of Château - Thierry and Battle of Belleau Wood ) in the summer of 1918 , and fought its major actions in the Battle of Saint - Mihiel and the Meuse - Argonne Offensive in the latter part of 1918 . </P>
<P> The American Expeditionary Forces ( A.E.F. , A.E.F. or AEF ) was a formation of the United States Army on the Western Front of World War I . The AEF was established on July 5 , 1917 , in France under the command of Gen. John J. Pershing . It fought alongside French Army , British Army , Canadian Army , and Australian Army units against the German Empire . A minority of the AEF troops also fought alongside Italian Army units in that same year against the Austro - Hungarian Army . The AEF helped the French Army on the Western Front during the Aisne Offensive ( at the Battle of Château - Thierry and Battle of Belleau Wood ) in the summer of 1918 , and fought its major actions in the Battle of Saint - Mihiel and the Meuse - Argonne Offensive in the latter part of 1918 . </P>
when did the us send troops to europe in ww1
when did the us send troops to europe in ww1
1917
1917