The Hmong are an Asian ethnic group from the mountainous regions of China, Vietnam, Laos, and Thailand. Hmong are also one of the sub-groups of the Miao ethnicity in southern China. Hmong groups began a gradual southward migration in the 18th century due to political unrest and to find more arable land.
A number of Hmong people fought against the communist-nationalist Pathet Lao during the Laotian Civil War. Hmong people were singled out for retribution when the Pathet Lao took over the Laotian government in 1975, and tens of thousands fled to Thailand seeking political asylum. [Wikipedia]