Ninth Corps Area

Ninth Corps Area
Ninth Corps Area
Active	20 August 1920–7 December 1941
Country	United States of America
Branch	United States Army
Type	Military District
Role	Training
Part of	Department of War
Garrison/HQ	Presidio of San Francisco, CA

The Ninth Corps Area was a Corps area of the United States Army from 20 August 1920 to 7 December 1941. It was formed at Cavalry Barracks, the Presidio of San Francisco from the discontinued Western Department. The Ninth Corps Area included the states of Washington, Oregon, Idaho, Montana, Wyoming, Utah, and Nevada.

Its formations included Fourth Army, IX Corps (3d Division, 40th Division, 41st Division), XIX Corps (91st Division, 96th Division, 104th Division), Ninth Coast Artillery District, 1st Wing (a formation which may have become the 1st Bombardment Wing), and Ninth Corps Area Service Command.

The Ninth Corps Area Training Center was established in 1921, at the Presidio of San Francisco to train regular army and organized reserve units, as well as ROTC cadets and Citizens' Military Training Camp candidates.

The Ninth Corps Area was redesignated as the Ninth Corps Area Service Command (CASC) in May 1941 and redesignated again as Ninth Service Command 22 July 1942.

In the 1947 reorganization, Headquarters, Ninth Service Command remained at Salt Lake City, Utah, as an area command under the Commanding General, Sixth Army at the Presidio of San Francisco. Its "functions and duties [were to be] prescribed by him."

Commanders

Ninth Corps Area

Major General Hunter Liggett 1 September 1920–21 March 1921
Brigadier General Richard M. Blatchford 21 March 1921–June 1921
Major General Charles H. Muir June 1921–July 1921
Major General William M. Wright July 1921–29 January 1922
Major General Charles G. Morton 30 January 1922–15 January 1925
Major General William H. Johnson 15 January 1925–13 February 1925
Major General Charles T. Menoher 13 February 1925–23 March 1926
Brigadier General Henry D. Todd 23 March 1926–15 June 1926
Major General James H. McRae 16 June 1926–31 December 1926
Major General John L. Hines 31 December 1926–10 September 1930
Brigadier General Frank M. Caldwell 10 September 1930–2 October 1930
Major General Douglas MacArthur 2 October 1930–20 November 1930
Major General Malin Craig 21 November 1930–24 January 1935
Brigadier General Otho B. Rosenbaum 1 February 1935–9 March 1935
Major General Paul B. Malone 9 March 1935–30 April 1936
Brigadier General Caspar H. Conrad Jr.1 May 1936–20 June 1936
Major General George S. Simonds 20 June 1936–8 March 1938
Major General Albert J. Bowley 8 March 1938–30 November 1939
Lt. Gen. John L. DeWitt 5 December 1939–8 November 1940

Ninth Corps Area Service Command

Major General Ernest D. Peek 8 November 1940–30 September 1941
Major General Jay L. Benedict 3 November 1941–2 April 1942

Ninth Service Command

Major General Kenyon A. Joyce (July 1942-11 October 1943)
Major General David McCoach Jr. (October 1943-1 September 1944)
Major General William E. Shedd Jr. (1 September 1944-22 May 1946)

References

1 2 3 4 5 Clay, Lt. Col. Steven E. (2010). "U.S. Army Order of Battle 1919–1941: Volume 1. The Arms: Major Commands and Infantry Organizations" (PDF). Combat Studies Institute Press, US Army Combined Arms Center.
↑ War Department Circular 138, p.29
↑ Millett, John D. (1987). "THE ORGANIZATION AND ROLE OF THE ARMY SERVICE FORCES" (PDF). CENTER OF MILITARY HISTORY. Archived from the original (PDF) on 2016-12-22. Retrieved 2026-07-09.
↑ "Biography of Major-General William Edgar Shedd (1885 – 1953), USA". generals.dk. Retrieved 2026-07-09.

[:1-1] 1 2 3 4 5 Clay, Lt. Col. Steven E. (2010). "U.S. Army Order of Battle 1919–1941: Volume 1. The Arms: Major Commands and Infantry Organizations" (PDF). Combat Studies Institute Press, US Army Combined Arms Center.

[2] War Department Circular 138, p.29

[:0-3] Millett, John D. (1987). "THE ORGANIZATION AND ROLE OF THE ARMY SERVICE FORCES" (PDF). CENTER OF MILITARY HISTORY. Archived from the original (PDF) on 2016-12-22. Retrieved 2026-07-09.

[4] "Biography of Major-General William Edgar Shedd (1885 – 1953), USA". generals.dk. Retrieved 2026-07-09.