XII Corps (United States)

XII Corps
Shoulder sleeve insignia of XII Corps
Active1921-33
1933–45
CountryUnited States United States
Branch United States Army
SizeCorps
Part ofThird United States Army
EngagementsWorld War II
Commanders
Notable
commanders
Manton S. Eddy
Stafford LeRoy Irwin
Route of march of U.S. XII Corps.

The XII Corps fought from northern France to Austria in World War II. Constituted in the Organized Reserves in 1933, it was activated on 29 August 1942 at Columbia, South Carolina. XII Corps became operational in France as part of Lieutenant General George S. Patton's Third Army on 1 August 1944. Initially commanded by Major General Gilbert R. Cook, bad health forced MG Cook to relinquish command to Major General Manton S. Eddy within three weeks. MG Eddy commanded the corps until late April 1945, when his own health problems forced him to turn over command to MG Stafford LeRoy Irwin.