Colonel Robert W. Trost was commissioned an Infantry Officer upon graduation from Officer Candidate School in 1943. His first duty assignment was as Unit Commander, IRTC Camp Robinson, Arkansas. | His subsequent duty assignments include: Rifle Company Officer and S-1, 505 and 508 PIR, 82d Airborne Division; Fort Bragg, North Carolina; Assistant Battalion S-3 and Assistant Division G2, 82d Airborne Division, Fort Bragg, North Carolina; Company Commander, Company F, 23d Infantry Regiment, Korea; Assistant G-2, 2d Infantry Division, Korea; Assistant G-1 and Assistant C/S, 82d Airborne Division, Fort Bragg; Plans Staff Officer, Headquarters Europe.