on 1 April 1968 at Atlanta, Georgia. Commanders Major General William H. Simpson (September, 1942 - October, 1943) Major General Gilbert R. Cook (1 November 1943 - 18 August 1944) Major General Manton S. Eddy (19 August 1944 - 19 April 1945) Major General Stafford LeRoy Irwin (20 April 1945 - September, 1945) References Weigley, Russell F. (1981). Eisenhower's Lieutenants. Bloomington: Indiana University Press. . Williams, Mary H., compiler (1958). U.S. Army in World War II, Chronology 1941–1945. Washington D.C.: Government Printing Office. Wilson, John B., compiler (1999). Armies, Corps, Divisions, and Separate Brigades. Washington D.C.: Government Printing Office. . Recommended readings George Dyer, XII Corps: Spearhead of Patton's Third Army, XII Corps History Association, 1947 Corps of the United States in World War II Corps of the United States Army Military units and formations established in 1942 1942 establishments in the United States Military units and formations disestablished in 1945