First Lieutenant Jean Eric Rydstrom was commissioned as an Infantry Officer upon graduation from Officer Candidate School, 9 June 1967. | His subsequent duty assignments were: Assistant G-1, U.S. Army Training Center, Fort Benning, Georgia; Platoon Leader, Company D, 4th Battalion, 12th Infantry, 199th Light Infantry Brigade, South Vietnam; Assistant S-1, Headquarters Company, 4th Battalion, 12th Infantry, 199th Light Infantry Brigade, South Vietnam; Assistant S-4, U.S. Army Garrison, Fort Lesley J. McNair, Washington, D.C.