Known in the Western world by the name "Viet Cong" (meaning "Red Vietnamese"), the National Liberation Front was a communist revolutionary organization that operated in South Vietnam and Cambodia after the post-colonial division of Vietnam in December 1960. During the Vietnam War, the NLF was a guerilla movement that fought primarily in the southern provinces of South Vietnam against the forces of the Army of the Republic of Vietnam and their international allies.
Although the NLF was officially disbanded in 1977 after Vietnam was successfully reunified, the organization had functionally ceased to exist after suffering catastrophic losses during the failed 1968 Tet Offensive. Although North Vietnam would continue to pay lip service to their southern comrades during the remainder of the conflict (even flying Viet Cong flags from their tanks as they entered Saigon), practically speaking the remainder of the conflict would be a conventional war, waged by the People's Army of Vietnam with what remained of the NLF providing logistical support.
