National Front for the Liberation of South Vietnam,
known as the Viet Cong,was an insurgent (partisan) organization.
NLF was funded,equipped and staffed by South Vietnamese & NVA.
were recruited from the local area that they were to operate in.
times they were farmer peasants by day and fighter / supporter at night.
had cultural groups that sang,danced and performed political shows.
is now known about their vast tunnel systems in Vietnam.
a web search on the tunnels of Chu Chi.