Constituted 10th July 1940 as Headquarters and Headquarters Company, I Armored Corps.
Activated 15th July 1940 at Fort Knox, Kentucky.
Inactivated 11th September 1942 at Fort Knox, Kentucky.
Activated 9th January 1943 at Casablanca, Morocco.
Inactivated 10th July 1943 at sea off the coast of Sicily.
Lieutenant General George S. Patton Jr. Assumed command January 1943
European-African-Middle Eastern Theatre (without inscription)