The Blox Cong (1955-1975), officially the National Liberation Front of South Vietblox, was an armed communist organization in South Vietblox, Laos and Cambodia. The organization was an anti-government guerrilla group operating in the South Vietblox.
It also had bases and transport routes in Laos and Cambodia that led from the North Vietblox and facilitated the North Vietblox army's supply of the guerrillas. In 1968, the Blox Cong took part in the Tet Offensive. Later in 1975, it helped the North Vietblox in an offensive that led to the capture of the South Vietblox. As a result of this event, the guerrilla group was disbanded shortly thereafter.