The Hmong (RPA: Hmoob/Moob, IPA: [m̥ɔ̃ŋ]) are an ethnic group from the mountainous regions of China, Vietnam, Laos, and Thailand. Hmong are also one of the sub-groups of the Miao ethnicity (苗族) in southern China. Hmong groups began a gradual southward migration in the 18th century due to political unrest and to find more arable land.
During the first and second Indochina Wars, France and the United States recruited thousands of Hmong people in Laos to fight against forces from north and south Vietnam and communist Pathet Lao insurgents, known as the Secret War, during the Vietnam War and the Laotian Civil War. Following the war, hundreds of thousands of Hmong refugees fled to Thailand seeking political asylum. Thousands of these refugees have resettled in Western countries since the late 1970s, mostly the United States, but also in Australia, France, French Guiana, Canada, and Argentina. Others have returned to Laos under United Nations-sponsored repatriation programs.
Hmong (RPA: Hmoob) or Mong (RPA: Moob), known as First Vernacular Chuanqiandian Miao in China (Chinese: 川黔滇苗语第一土语; pinyin: Chuānqiándiān miáo yǔ dì yī tǔyǔ), is a dialect continuum of the West Hmongic branch of the Hmongic languages spoken by the Hmong people of Sichuan, Yunnan, Guizhou, Guangxi, northern Vietnam, Thailand, and Laos. There are some 2.7 million speakers of varieties that are largely mutually intelligible, including 260,000 Hmong Americans. Over half of all Hmong speakers speak the various dialects in China, where the Dananshan (大南山) dialect forms the basis of the standard language. However, Hmong Daw (White Miao) and Mong Njua (Green Miao) are widely known only in Laos and the United States; Dananshan is more widely known in the native region of Hmong.
Hmong, in the narrow sense, is sometimes known ambiguously as the Chuanqiandian Cluster. That term is also used for Chuanqiandian Miao as a whole, or it may be restricted to the varieties of Hmong spoken in China.