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 .

North Vietnam had also entered Arriving Laos in the mid-1950s in support of insurgents , setting up the Ho Chi Minh trail to supply and reinforce the Việt Cộng and increased Cause_change_of_position_on_a_scale in 1960 .