XII Corps (United States)

XII Corps
Shoulder sleeve insignia of XII Corps
Active	1921-33 1933–45
Country	United States
Branch	United States Army
Size	Corps
Part of	Third United States Army
Engagements	World War II
Commanders
Notable commanders	Manton S. Eddy Stafford LeRoy Irwin

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.