Colonel Darryl L. Pattillo was commissioned an Infantry Officer upon graduation from Officer Candidate School on 5 September 1969. His first duty assignment was as Rifle Platoon Leader, Company A, 3d Battalion, 143d Infantry (Airborne), 71st Infantry Brigade (Airborne), Texas Army National Guard. | His subsequent duty assignment included: Staff Officer, United States Army Combat Arms Training Board, Fort Benning, Georgia; Liaison Officer, Headquarters, 36th Airborne Brigade; Control Group; Company Commander, Assistant S-3 (Air), S-3, 2d Battalion, 7th Cavalry (Mechanized), 1 st Cavalry Division; Department of Tactics, United States Army Command and General Staff College, Fort Leavenworth, Kansas; Plans Officer (G-3 War Plans Division) Headquarters, I Corps, Fort Lewis, Washington; Battalion Executive Officer (Counterpart), Headquarters, 1st Battalion, 506th Infantry Camp Greaves, Korea; Instructor, 4162 USARF School; Liaison Officer (IMA), Secretary of the Army, Office of the Chief of Legislative Liaison; Deputy Chief of Legislative Liaison (IMA), Office of the Secretary of the Army.