George Sisler was an Intelligence Officer, Green Beret, and a member of the Military Assistance Command Vietnam, Studies and Observations Group (MACVSOG). On February 7, 1967, Sisler saved his unit from being annihilated by a vastly larger enemy force but was killed in the process. He was posthumously awarded the Medal of Honor for his valor.

Sisler was born in Dexter, Missouri in September 1937. He joined the military as an enlisted man first with the Army National Guard and then the U.S. Army Reserves from 1956 until 1958. Following that, he served for four years in the U.S. Air Force from 1958-1962. He went to Arkansas State University in Jonesboro where he graduated in 1964 with a BS in Education. In 1963, while a student at ASU, Sisler won the 1963 National Collegiate Skydiving Championship while his leg was in a cast. He enlisted in the Army on August 20, 1964. 

Sisler went to Vietnam and was assigned officially as a first lieutenant and intelligence officer with the Headquarters Company of the Fifth Special Forces Group (Airborne), First Special Forces. However, this was a cover assignment. As mentioned in John Plaster’s excellent book SOG – The Secret War of America’s Commandos in Vietnam, Sisler was actually serving with a classified organization known as the Studies and Observation Group (SOG).