Colonel Edgar Nicholas Glotzbach was commissioned an Infantry Officer upon graduation from Officer Candidate School, Class 233-43, 15 May 1943. His first duty assignment was as an Instructor, Rifle Marksmanship Unit, U.S. Army Infantry School, Fort Benning, Georgia. | His subsequent duty assignments include: Platoon Leader, 263rd Infantry Regiment, 66th Infantry Division, Camp Rucker, Alabama; Platoon Leader, 263rd Infantry Regiment, 66th Infantry Division, U.S. Army Europe; Company Commander, Headquarters Berlin Command, U.S. Army Europe; Instructor, Reserve Officer Training Corps Detachment, University of Wichita, Wichita, Kansas; Assistant Battalion Executive Officer, 1st Battalion, 27th Infantry Regiment, Korea; Assistant Adjutant & Adjutant, 27th Infantry Regiment, Korea; Assistant Adjutant, Headquarters Detachment, 1st Support Troop Battalion, Fort Benning, Georgia; Instructor, Department of Tactics & Combined Arms, The Artillery School; Fort Sill, Oklahoma; Chief, Operations Divisions, G1 Section, Headquarters Antilles Command, U.S. Army Caribbean, Fort Brooke, Puerto Rico; Chief, Office of Deputy Chief of Staff for Personnel, Command and Programs Branch, Authorizations Division, Washington, D.C.; Executive Officer, 1st Brigade, 1st Infantry Division, Fort Riley, Kansas; Executive Officer, 2nd Brigade, 1st Infantry Division, Republic of Vietnam; Commander, 2nd Battalion, 18th Infantry, 1st Infantry Division, Republic of Vietnam; Commander, 1st Brigade, 1st Infantry Division, Republic of Vietnam; Commander, 3rd Brigade, 5th Mechanized Infantry Division, Fort Carson, Colorado; Director, Command and General Staff College, Department of Tactics, Division Operations, Fort Leavenworth, Kansas; Director, Department of Nonresident Instruction, Fort Leavenworth, Kansas.