The Army of the Republic of Vietnam Special Forces ( or "") were the elite military units of the Army of the Republic of Vietnam (ARVN). Following the establishment of the Republic of Vietnam (commonly known as South Vietnam) in October 1955, the Special Forces were formed at Nha Trang in February 1956. During the rule of Ngô Đình Diệm, the Special Forces were run by his brother, Ngô Đình Nhu, until both were assassinated in November 1963 in a coup. The Special Forces were disbanded in 1975 when South Vietnam ceased to exist after the Fall of Saigon.