Dictionary.net

• an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the Armistice on November 11

2006 - WordNet 3.0
By Princeton University

• an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the Armistice on November 11

2011 - English Dictionary Database
By DataStellar Co., Ltd