Rubuta ci gaba don wannan sakin layi - Zaman lafiya da yarjejeniyar ta tsara ya kasance shekaru biyu kawai. Pathet Lao ya ki ya janye makamai kuma PAVN ba ta bar kasar ba. A ƙarshen Fabrairun 1975, Pathet Lao tare da taimakon PAVN, sun fara kai hari kan sansanonin gwamnati a Filayen Jars. Tare da faduwar gwamnatin Kambodiya ga Khmer Rouge a ranar 17 ga Afrilu da faduwar gwamnatin Kudancin Vietnam
zuwa PAVN a ranar 30 ga Afrilu 1975 wadanda ba 'yan gurguzu ba ne na gwamnatin kasa sun yanke shawarar cewa barin Pathet Lao ya hau mulki zai fi kyau fiye da barin su su karbe shi da karfi. An kwashe Long Tieng a tsakiyar watan Mayu. A ranar 23 ga Agusta, 1975, sojojin Pathet Lao sun shiga babban birnin Vientiane.