 He served as an aide to Major General Frank C. Bolles, and then started the Advanced Equitation Course, from which he graduated in 1936.Hines then commanded a troop with the 3rd Cavalry Regiment at Fort Myer, Virginia and was promoted to captain.He then served as an instructor in tactics and equitation at West Point, where he also served as the supply officer and adjutant for the post's cavalry squadron, as well as coach of the Cadet polo team.