This is a complete list of major generals in the United States Regular Army before July 1, 1920. For most of the 19th and early 20th centuries, the rank of major general was the highest possible in the Regular Army. It was also one of the rarest: until 1915, there were at most eight major generals on active duty at any given time. Even when the Army expanded during times of war, the number of Regular Army major generals remained relatively constant because instead of increasing the permanent military establishment to meet transient wartime needs, the Regular Army was used as a cadre for a vast non-permanent establishment of volunteer and conscript forces. Many of the most famous major generals of the American Civil War held that rank only in the volunteer service, and reverted to a much lo