On 30 January 1971 , an Indian Airlines passenger airliner named Name_conferral Ganga , flying Motion from Srinagar to Jammu , was hijacked Terrorism by two Kashmiri separatists belonging to the National Liberation Front ( NLF , the antecedent of Jammu and Kashmir Liberation Front ) .

Pakistan reacted Response by charging Judgment_communication the hijackers and other NLF militants with conspiracy .

The targets Aiming of these attacks Attack were sanctuaries and Base Areas of the People 's Army of Vietnam ( PAVN — commonly referred to during the Vietnam War Hostile_encounter as the North Vietnamese Army [ NVA ] ) and forces of the Viet Cong ( NLF ) , which utilized Using them for resupply Supply , training Education_teaching , and resting between campaigns Military_operation across the border in the Republic of Vietnam ( South Vietnam ) .

The Việt Cộng , also known as or `` NLF '' ( the National Liberation Front ) , a South Vietnamese common front under the direction of North Vietnam , initiated Process_start a guerrilla war in the south .

The Tet Offensive of 1968 showed Presence the lack of progress with these doctrines as the NLF and PAVN mounted Connect large-scale urban offensives throughout 1968 , turning US domestic support against the war .

The NLF sustained heavy losses during the Tet Offensive , losing over half its strength in a matter of months , which combined with subsequent U.S.-ARVN operations in the rest of 1968 , nearly wiped out the southern insurgency .

The CIA 's Phoenix Program further degraded Cause_change_of_position_on_a_scale the NLF 's membership and capabilities .

By the end of the year , the NLF insurgents held Hold almost no territory in South Vietnam , and their recruitment dropped Motion_directional by over 80 % in 1969 , signifying a drastic reduction in guerrilla operations and necessitating increased Cause_change_of_position_on_a_scale use of NVA regulars from the north .

In 1969 , North Vietnam declared Expressing_publicly a Provisional Revolutionary Government in South Vietnam in an attempt to give the reduced NLF a more international stature , but the southern guerrillas from then on were sidelined as PAVN forces begun more conventional Combined arms warfare .