Mezue ahịrịokwu a: Ndị American Expeditionary Forces (A.E.F. ma ọ bụ AEF) bụ otu ndị agha nke United States Army na Western Front nke Agha Worldwa Mbụ. E guzobere AEF na July 5, 1917, na France n'okpuru iwu nke General John J. Pershing. Ọ lụrụ ọgụ n'akụkụ ndị agha France, ndị agha Britain, ndị agha Canada, na ndị agha Australia megide ndị agha Imperial German. Obere ndị agha nke AEF lụkwara ọgụ n'akụkụ ndị agha Italy n'otu afọ ahụ megide ndị agha Austro-Hungarian. Ndị AEF nyeere ndị agha France aka na Western Front n'oge Agha Ụwa nke Abụọ.
Aisne Offensive (na Agha nke Château-Thierry na Agha nke Belleau Wood) n'oge ọkọchị nke 1918, ma lụọ ọgụ ya na Agha nke Saint-Mihiel na Meuse-Argonne Offensive na akụkụ ikpeazụ nke 1918.