Just in case you don't know the Hmong are a ethnic minority that live in Vietnam, Laos, Thailand, Burma and China. In the USA, most Hmong are from Laos because of persecution they came to the US in return for their military service during the Vietnam war...fighting in Laos along the Ho Chi Min trail along the border of Laos, and vietnam.
http://en.wikipedia.org/wiki/Hmong_people