 He later served as an instructor at the U.S. Army Cavalry School and on the General Staff of the War Department.During World War II he served as the Assistant Chief of Staff of IX Corps, and later in 1942 as Deputy Chief of Staff of the China-Burma-India Theater of Operations.From 1942 to 1943 Deputy Chief of Staff Allied Forces Headquarters (AFHQ) before being assigned as Assistant Division Commander (ADC) of the 1st Infantry Division.