Gary Lee Littrell is a retired United States Army Command Sergeant Major who, while a Sergeant First Class serving as an adviser to Army of the Republic of Vietnam's Ranger units during the Vietnam War, acted with extraordinary courage during a four-day siege on his battalion — for which he received the Medal of Honor.

MEDAL OF HONOR
For conspicuous gallantry and intrepidity in action at the risk of his life above and beyond the call of duty. Sfc. Littrell, U.S. Military Assistance Command, Vietnam, Advisory Team 21, distinguished himself while serving as a Light Weapons Infantry Advisor with the 23d Battalion, 2nd Ranger Group, Republic of Vietnam Army, near Dak Seang. After establishing a defensive perimeter on a hill on April 4, the battalion was subjected to an intense enemy mortar attack which killed the Vietnamese commander, one adviser, and seriously wounded all the advisors except Sfc. Littrell. During the ensuing 4 days, Sfc. Littrell exhibited near superhuman endurance as he singlehandedly bolstered the besieged battalion. Repeatedly abandoning positions of relative safety, he directed artillery and air support by day and marked the unit's location by night, despite the heavy, concentrated enemy fire. His dauntless will instilled in the men of the 23d Battalion a deep desire to resist. Assault after assault was repulsed as the battalion responded to the extraordinary leadership and personal example exhibited by Sfc. Littrell as he continuously moved to those points most seriously threatened by the enemy, redistributed ammunition, strengthened faltering defenses, cared for the wounded and shouted encouragement to the Vietnamese in their own language. When the beleaguered battalion was finally ordered to withdraw, numerous ambushes were encountered. Sfc. Littrell repeatedly prevented widespread disorder by directing air strikes to within 50 meters of their position. Through his indomitable courage and complete disregard for his safety, he averted excessive loss of life and injury to the members of the battalion. The sustained extraordinary courage and selflessness displayed by Sfc. Littrell over an extended period of time were in keeping with the highest traditions of the military service and reflect great credit on him and the U.S. Army.