Dictionary.com
Thesaurus.com

American Expeditionary Forces

American  

plural noun

  1. troops sent to Europe by the U.S. Army during World War I. A.E.F., AEF


American Expeditionary Forces British  

plural noun

  1. the troops sent to Europe by the US during World War I

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012