"The National Front for the Liberation of South Vietnam (NLF) was formed. The NLF, or the 'Vietcong', as the Americans were to call them, was made up of over a dozen different political and religious groups "( http://spartacus-educational.com/VietnamWar.htm). They would go through the South and kill anyone who resisted to agree with their thoughts. Eventually the North took over Saigon, the Souths capital, and took over the whole country. They were so successful because of how they would fight. They hid in the trees and launch sneak attacks against the South.