The Viet Cong was a communist-led guerrilla force that operated in South Vietnam during the Vietnam War. Formally known as the National Front for the Liberation of South Vietnam, they aimed to overthrow the South Vietnamese government and reunify Vietnam under communist rule. The Viet Cong utilized unconventional warfare tactics, including ambushes and sabotage, to combat the more conventional military forces of the United States and South Vietnam. The Viet Cong received support from North Vietnam, which provided them with supplies, training, and reinforcements. Their efforts were part of a larger conflict that involved significant international involvement, including the U.S. military's extensive engagement in the region. The Viet Cong played a crucial role in the eventual fall of Saigon in 1975, leading to the reunification of Vietnam.