Gary Lee Littrell is a retired United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 Command Sergeant Major who, while a Sergeant First Class

Sergeant First Class

Sergeant First Class is the seventh enlisted rank in the U.S. Army, above Staff Sergeant and below Master Sergeant and First Sergeant, and is the first senior non-commissioned officer rank...

 serving as an adviser to Army of the Republic of Vietnam

Army of the Republic of Vietnam

The Army of the Republic of Viet Nam , sometimes parsimoniously referred to as the South Vietnamese Army , was the land-based military forces of the Republic of Vietnam , which existed from October 26, 1955 until the fall of Saigon on April 30, 1975...

's Ranger

Vietnamese Rangers

The Vietnamese Rangers, properly known in Vietnamese as the Biệt Ðộng Quân, more commonly known as the ARVN Rangers, were the Rangers of the Army of the Republic of Vietnam. Trained and assisted by American Special Forces and Ranger advisers, the Vietnamese Rangers infiltrated beyond enemy lines in...

 units during the Vietnam War

Vietnam War

The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

, acted with extraordinary courage during a four day siege on his battalion — for which he received the Medal of Honor

Medal of Honor

The Medal of Honor is the highest military decoration awarded by the United States government. It is bestowed by the President, in the name of Congress, upon members of the United States Armed Forces who distinguish themselves through "conspicuous gallantry and intrepidity at the risk of his or her...

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Between April 4 and April 8, 1970, while serving on Advisory Team 21 of I Corps Advisory Group, in Kontum Province, Republic of Vietnam

South Vietnam

South Vietnam was a state which governed southern Vietnam until 1975. It received international recognition in 1950 as the "State of Vietnam" and later as the "Republic of Vietnam" . Its capital was Saigon...

, Sergeant First Class Littrell was a Light Weapons Infantry Advisor with the 23rd Battalion, 2nd Ranger Group.