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| XII Corps | |
|---|---|
&sq=Envato&lang=en&file=File:XII_CORPS_SSI.gif) 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 |
| U.S. Corps (1939–present) | ||||
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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.