page_title: List of major generals in the United States Regular Army before 1 July 1920
section_title: Major generals of the staff
hierarchical_section_title: List of major generals in the United States Regular Army before 1 July 1920 / History / Major generals of the staff
caption_attribution_description: English: Major General Frederick Crayton Ainsworth at New Years reception.
context_page_description: 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 lower permanent grade in the Regular Army when the volunteer force was disbanded after the war.
  The number of Regular Army major generals increased dramatically when the Army was reorganized after World War I. The new peacetime establishment maintained a total of 34 active-duty major generals, including 21 major generals of the line and 13 major generals of the staff.
context_section_description: Officers in the Regular Army were classified either as line officers, who commanded combat formations, or staff officers, who performed specialized support functions. Permanent promotions to general officer grades were only available in the line. Staff officers could temporarily acquire the rank and pay of a general officer while detailed to certain offices designated by statute to carry that rank, such as chief of a staff bureau, but reverted to their permanent grades upon leaving such an office. Officers holding the permanent personal grade of general officer were called general officers of the line, while general officers holding only temporary ex-officio rank were called general officers of the staff.
  For most of the 19th century, general officers of the staff were limited to the rank of brigadier general, but in 1900 the rank of the Adjutant General was temporarily increased to major general for the term of its then-incumbent, Henry C. Corbin. In 1904 Corbin transferred to a line command but retained the office of Adjutant General and its associated rank. In his absence, the Adjutant General's Department was merged with the Record and Pension Office into a consolidated bureau headed by Fred C. Ainsworth, who was appointed Military Secretary with the rank of major general. The Military Secretary was retitled Adjutant General after Corbin retired in 1906, and the office's rank reverted to brigadier general when Ainsworth was dismissed in 1912.
  Major generals of the staff proliferated after 1912, when the Quartermaster Corps was created under a Quartermaster General bearing the temporary rank of major general. The Surgeon General reached that rank in 1915 when William C. Gorgas was appointed to that post and promoted to major general in the Medical Department to reward his service during the construction of the Panama Canal. The Chief of Coast Artillery became a major general of the staff in 1916. Finally, every other chief of a staff corps, department, or bureau was elevated to major general on October 6, 1917.
caption: Fred C. Ainsworth
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