# XIX Corps (United States)

U.S. Corps (1939–present) :
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XIX Corps was a corps-sized formation of the United States Army, that served during World War II and the Cold War. There have been three U.S. Army formations given the designation "XIX Corps," none of which are lineally related.

## History
### XIX Corps (I)

The first iteration of the XIX Corps was authorized by the National Defense Act of 1920 and was to be composed of units of the Organized Reserve located primarily in the Ninth Corps Area. The corps headquarters and headquarters company were constituted on 29 July 1921 in the Regular Army, allotted to the Ninth Corps Area, and assigned to the Sixth Army. The corps headquarters was organized in February 1922 with Reserve personnel at San Francisco, California. The headquarters company was organized in February 1923 with Reserve personnel at San Francisco. The headquarters conducted staff training from 5–19 June 1927 with the headquarters, 30th Infantry Regiment, at the Presidio of San Francisco. The corps headquarters was withdrawn from the Regular Army on 1 October 1933 and demobilized.

### XIX Corps (II)

US World War II Armored Corps :
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The second iteration of the XIX Corps was constituted in the Organized Reserve on 1 October 1933, allotted to the Ninth Corps Area, and assigned to the Fourth Army. The headquarters was concurrently initiated at San Francisco, with Reserve personnel previously assigned to the demobilized XIX Corps (RAI). The
designated mobilization station was Presidio of San Francisco, where the corps headquarters would assume command and control of its subordinate corps troops, which would then be mobilizing throughout the Ninth Corps Area. It was redesignated on 1 January 1941 as Headquarters, XIX Army Corps. The XIX Corps was not activated prior to World War II and was located in San Francisco as of 7 December 1941 in an inactive reserve status.

### III Armored Corps (XIX Corps)

The Headquarters, III Armored Corps was constituted in the Army of the United States on 7 July 1942, and activated at Camp Polk, Louisiana on 20 August 1942 under the command of Major General Willis D. Crittenberger during World War II. On October 10, 1943, the Headquarters, III Armored Corps was reorganized and re-designated as Headquarters and Headquarters Company, XIX Corps. It fought as part of the First and Ninth Armies, fighting on the Western Front of World War II. Disbanded on 5 September 1945 in France, it was reconstituted on 12 July 1950 in the Army of the United States. It was allotted to the Regular Army in October 1959 and activated on 1 November that year at Fort Chaffee, Arkansas, where it controlled reserve units in its immediate region. It was inactivated on 1 April 1968 at Fort Chaffee.
* III Armored Corps Shoulder Sleeve Insignia August 20, 1942 - October 10, 1943
* XIX Corps Shoulder Sleeve InsigniaOctober 2, 1935 - October 1, 1943 Organized Reserve Unit
* XIX Corps Shoulder Sleeve InsigniaOctober 1943 - March 10, 1949
* XIX Corps Shoulder Sleeve InsigniaAfter March 10, 1949 This patch unofficially began use around January 1944 and was the primary patch used during WWII, and was worn throughout the 1950s-60s.
Organization: XIX Corps on 1 March 1945 :
| Army Group | Army | Corps | Division |
| 21st Montgomery | Ninth Army Simpson | XIX Corps McLain | 2nd Armored Division |
| 21st Montgomery | Ninth Army Simpson | XIX Corps McLain | 29th Infantry Division |
| 21st Montgomery | Ninth Army Simpson | XIX Corps McLain | 30th Infantry Division |
| 21st Montgomery | Ninth Army Simpson | XIX Corps McLain | 83rd Infantry Division |