First Lieutenant Karl Timmermann was commissioned as an Infantry Officer upon graduation from Officer Candidate School Class 541, 16 February 1943. His first duty assignment was as a member of Company A, 27th Armored Infantry Battalion, 9th Armored Division. | His subsequent assignments include: Company Commander, 27th Armored Infantry Division, 9th Armored Division, European Theater of Operations; Company Commander, 7th Mechanized Cavalry Reconnaissance Troops, 7th Infantry Division.