A graduate of Wayne State (Nebraska) College, Billy C. Mossman served as a platoon leader with the 381st Infantry, 96th Infantry Division, and participated in the Leyte and Okinawa campaigns in the Pacific theater. In the Korean War, he was a military historian with the Eighth Army; Army Forces, Far East; and United Nations Command Military Armistice Commission. In 1954 Mossman joined the Office of the Chief of Military History as an Army officer in 1954 and became a civilian staff member in 1957. As a civilian staff member, he served successively as historian, deputy branch chief, branch chief, and acting division chief and authored a number of studies and monographs on U.S. Army operations in the Korean War.