Bing found the following results
National Liberation Front (NLF) | Facts, History, & Vietnam War
Viet Cong - Wikipedia
National Liberation Front formed | December 20, 1960 | HISTORY
Battlefield:Vietnam | History - PBS
National Liberation Front | Vietnam War, Algeria, Marxism
National Liberation Front - History Learning Site
The Vietnam War (article) | 1960s America | Khan Academy
National Liberation Front - Oxford Reference
Episodes 5-8 | National Archives