Hugh Clowers Thompson Jr.
Hugh Clowers Thompson Jr. in 1966
Born	April 15, 1943 Atlanta, Georgia, United States
Died	January 6, 2006 (aged 62) Pineville, Louisiana, United States
Allegiance	United States of America
Service/branch	United States Navy  United States Army
Years of service	1961–1964 (United States Navy) 1966–1983 (United States Army)
Rank	Major
Unit	Naval Mobile Construction Battalions 2nd Battalion, 123rd Aviation Battalion, 23rd Infantry Division
Battles/wars	Vietnam War Tet Counteroffensive Mỹ Lai Massacre
Awards	Soldier's Medal Distinguished Flying Cross Bronze Star Medal Purple Heart Air Medal

Hugh Clowers Thompson Jr. (April 15, 1943 – January 6, 2006) was a United States Army Major, and a former warrant officer in the 123rd Aviation Battalion of the 23rd Infantry Division. He is credited with ending the Mỹ Lai Massacre of the South Vietnamese village known as Sơn Mỹ on March 16, 1968, alongside and above-hierarchically Glenn Andreotta and Lawrence Colburn.

During the massacre, Thompson and his Hiller OH-23 Raven crew, Glenn Andreotta and Lawrence Colburn, stopped a number of killings by threatening and blocking American officers and enlisted soldiers of Company C, 1st Battalion, 20th Infantry Regiment, 11th Brigade, 23rd Infantry Division. Additionally, Thompson and his crew saved a number of Vietnamese civilians by personally escorting them away from advancing United States Army ground units and assuring their evacuation by air. Thompson reported the atrocities by radio several times while at Sơn Mỹ. Although these reports reached Task Force Barker operational headquarters, nothing was done to stop the massacre. After evacuating a child to a Quảng Ngãi hospital, Thompson angrily reported to his superiors at Task Force Barker headquarters that a massacre was occurring at Sơn Mỹ. Immediately following Thompson's report, Lieutenant Colonel Frank A. Barker ordered all ground units in Sơn Mỹ to cease search and destroy operations in the village.