The XV Corps of the US Army was initially constituted on 1 October 1933 as part of the Organized Reserves, and was activated on 15 February 1943 at Camp Beauregard, Louisiana. During the Second World War, XV Corps fought for 307 days in the European Theater of Operations, fighting from Normandy through France and southern Germany into Austria. The corps was commanded in combat by Major General Wade H. Haislip, initially as a subordinate unit to the Third U.S. Army and later as part of the Seventh U.S. Army.