CIA activities in Vietnam the next 14 years, the focus of their paramilitary operations changed over time. Until 1964, the Hmong fighters in Laos focused on trying to fight back North Vietnamese fighters and on preventing further encroachment. They were highly important, because the US hadn't begun putting troops on the ground in any great numbers, yet. After that, in 1965, the report describes the Hmong activities in Laos as "flitt[ing] over mountain trails or mov[ing] by air to occupy key high ground and to harass Hanoi's tanks and artillery," meaning that US troops took on a frontline role and asked the paramilitary forces
Australian Army Training Team Vietnam later. Serong would later be seconded, and in one capacity or another would remain in Vietnam until the fall of Saigon in 1975, serving as a senior advisor to both the US and South Vietnamese governments. On arrival, the unit joined a large group of US advisors and were dispersed across South Vietnam in small groups. Three groups were dispatched to South Vietnam's northern provinces, training members of the Army of the Republic of Vietnam (ARVN) at the National Training Centre at Dong Da and South Vietnamese Regional Forces (RF) at Hiep Khanh, while a fourth was based at the