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
1964 in the Vietnam War Vietnam and the introduction of U.S. combat troops into South Vietnam. By year's end, the 23,000 U.S. military personnel in South Vietnam were still technically "advisers" (although they participated in many air and ground operations with the ARVN), but Johnson was contemplating U.S. ground troops. At the time, most of the reports and conversations mentioned below were secret; they were not made public for many years. U.S. Ambassador to South Vietnam Henry Cabot Lodge Jr. reported to Washington that the new President of South Vietnam Dương Văn Minh told him that he opposed American soldiers going into villages and districts