XIX Corps was constituted as the III Armored Corps at Camp Polk, Louisiana on 7 July 1942 under the command of Major General Willis D. Crittenberger. It was activated on 20 August the same year at Camp Polk. It was retitled as Headquarters and Headquarters Company, XIX Corps, on 10 October 1943. It fought as part of the First and Ninth U.S. Armies in the Normandy, Northern France, Rhineland, and Central Europe campaigns 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. It was inactivated on 1 April 1968 at Fort Chaffee.