XXI US Army Corps, IGMR

The XXI US Army Corps was a corps-level command of the United States Army during World War II. Activated in January 1944 at the Infantry Ground Mechanized Replacement (IGMR) Training Center, the corps was initially responsible for organizing and training replacement units for deployment overseas. Later, XXI Corps was deployed to the European Theater, where it became part of the Seventh Army. The corps played a key role in the final Allied offensives in France and Germany, most notably in the reduction of the Colmar Pocket and the advance into southern Germany in 1945. After the war, XXI Corps was inactivated as part of the general demobilization of the US Army.