After earning the American League batting title in 1918, Ty Cobb joined the Army and served overseas with the Chemical Corps at the Allied Expeditionary Headquarters in Chaumont, France. His unit commander was Maj. Branch Rickey and he served alongside fellow officers Christy Matthewson and George Sisler – Hall of Famers, all. Capt. Cobb received an honorable discharge and returned to baseball in time to win his third straight AL batting title in 1919.