United States Army Vietnam (USARV), Individual Training Group (UITG) / Forces Armee Nationale Kher (FANK) Training Command was established in 1971 under an agreement with the US , Cambodian and the Republic of Vietnam Governments. The arrangement allowed US Special Forces to train Cambodian Nationals that were assigned to the Forces Armee Nationale Khmer (FANK) within the borders of Vietnam. The unit had a total of four different training centers that were located at Chi Lang, Phuc Tuy, Long Hai and Dong Ba Thin. During the history of the detachment, they trained a total of 85 Cambodian Army Battalions and one Cambodian Marine Battalion. The newly trained units were returned to Cambodia to fight the Communist backed Khmer Rouge.
After the North Vietnamese Army (NVA) Easter Offensive of 1972, UIT was anded and had Mobile Training Teams (MTT's) and Security Training Teams (STT's) assigned from the 1st Special Forces Group (ABN) that helped retrain fifty-four Army of the Republic of Vietnam (ARVN) Infantry Battalions, fourteen Ranger Battalions, eight Reconnaissance Companies and one Tank Regiment prior to its closing in January 1973.