In World War II, the 78th Division was ordered into active military service at Camp Butner, North Carolina on 15 August 1942. It was designated as a replacement pool division on 1 October 1942, and remained in this assignment until 1 March 1943, when the 78th Division was restored to field duty, and to its training regimen. 78th Division moved to the Carolina Maneuver Area on 15 November 1943 to test its training, and then returned to Camp Butner on 7 December 1943. The personnel then went on Christmas leave, and deployed to the Tennessee Maneuver Area on 25 January 1944, where they participated in the 5th Second Army Tennessee Maneuvers. They then moved to Camp Pickett, Virginia, where they filled their TO&E,(table of organization and equipment), then deployed to the staging area at Camp Kilmer, NJ on 4 October 1944.