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
1971 in the Vietnam War Chenla II was a major military operation conducted by the Cambodian military (then known as FANK) during the Cambodian Civil War. The Cambodian military failed to dislodge the communist North Vietnamese Army and Viet Cong from territory and suffered heavy casualties. Operation Jefferson Glenn was the last major ground operation in which U.S. troops participated in the Vietnam War. Three battalions of the 101st Airborne patrolled the area west of the city of Huế, called the "rocket belt," to try to prevent communist rocket attacks. The Americans were gradually replaced by soldiers of the South Vietnamese army. The Americans and