Before opening up your mouth and showing us how ignorant you are, know your history...
During the Vietnam War, the US recruited the Hmong and trained, paid, and provided military weapons to them; for the purpose of engagement in guerrilla warfare against the North Vietnamese.
Hmong soldiers rescued downed American pilots from enemy territories and defended American outposts in Laos. One such outpost was an airport by the name of Luang Prabang. Whole groups of Hmong soldiers risked and lost their lives to save one American pilot. They also attacked many North Vietnamese convoy that were using the Ho Chi Minh trail, which cross Northern Laos from North Vietnam into South Vietnam. By attacking these supplies thousands of U.S. soldiers did not die in South Vietnam. They valiantly fought for their cause through out the entire Secret War.
When the U.S. withdrew its troops from South Vietnam in 1975, they also withdrew the training teams, military weapons, and financial support from Laos and the Hmong. This action weakened the Laotian government and Hmong guerillas army that depended on that support. The Pathet Lao communist party eventually took over Laos and the Hmong that were left behind were seen as a threat and persecuted.
Deserted by their U.S. allies, the Hmong had to flee to Thailand for refuge. The Secret War ended in the same year as the Vietnam Waró1975. The Hmong did not feel this finality, for to this day they still are persecuted