Fourteen Choctaw Indian men in the Army's 36th Division trained to use their language for military communications. Their communications, which could not be understood by Germans, helped the American Expeditionary Force win several key battles in the Meuse-Argonne Campaign in France, during the last big German offensive of the war. Within 24 hours after the US Army starting using the Choctaw speakers, they turned the tide of battle by controlling their communications. In less than 72 hours, the Germans were retreating and the Allies were on full attack. The 14 Choctaw Code Talkers were Albert Billy, Mitchell Bobb, Victor Brown, Ben Caterby, James Edwards, Tobias Frazer, Ben Hampton, Solomon Louis, Pete Maytubby, Jeff Nelson, Joseph Oklahombi, Robert Taylor, Calvin Wilson, and Captain Walter Veach.