They were called the Vietcong
Communist guerrilla movement in Vietnam that fought the South Vietnamese government forces 1954-75 with the support of the North Vietnamese army and opposed the South Vietnamese and US forces in the Vietnam War.
Cong is short for Viet Cong. The Viet Cong were the communist guerrilla forces backed by North Vietnam when they fought against South Vietnam during the Vietnam War.
the guerrilla fought in the war
south Korea forces were also involved but none other
Korean war
Vietnam War
They were called the Vietcong also known as the NLF (national liberation front)
Prior to the resolution, Vietnam was strictly a guerrilla war; fought between government forces and southern (VC) communist guerrillas. After the resolution; the US committed conventional US troops and commenced open warfare against the North Vietnam. Translation: Vietnam converted from a un-conventional guerrilla war into a conventional war against another country (minus nuclear weapons).
The Hukbalahap (Hukbong Bayan Laban sa Hapon) was one of the largest and best-organized resistance groups in Luzon during the Japanese period. It was a communist-led guerrilla group that fought against Japanese forces and later also against the post-war Philippine government.
Viet Congs: North communist Vietnamese supporters of the communist Front in North Vietnam during the Vietnam War (known in Vietnam as the American War). The Viet Congs fought against both the government/military of South Vietnam and the armed forces of the United States between 1959 and 1975. They were initially a loose grouping of guerrilla fighters. Quick Note: South Vietnam/South Vietnamese didn't want the communist takeover from communist North Vietnam, they wanted to be a democratic country. U.S. entered the war to stop the spread of communism and support the democratic South Vietnam.
They were the resistance element within South Vietnam and were largely controlled by the Communist North Vietnamese.
US, Australia, New Zealand, Philippines, South Korea, South Vietnam, Thailand verses NORTH VIETNAM (supplied by Communist China/USSR) & their southern guerrilla allies (the Viet Cong).