Deo Van Long (left), Lord of the Tai Federation of Sipsongchuthai (Lai Chau 1887 - Toulouse 1975) at the wedding of his daughter

Under his father Deo Van Tri, he was the scion of a hereditary feudal noble line with roots in Yunnan province. <br/><br/>Under his father Deo Van Tri, he was the scion of a hereditary feudal noble line with roots in Yunnan province. He compelled the Hmong of the Federation to sell to him at below-market prices, thus making enormous profit from his sales to the French, This made him rich, but severed his relationship with the Hmong of the Federation, who supported the Viet Minh during the First Indochina War. His use of force to suppress Hmong resistance also decreased his popularity with the Hmong.<br/><br/><br/>Hmong resistance also decreased his popularity with the Hmong. As the Dien Bien Phu campaign came to an end, he was helicoptered away to Hanoi. He later immigrated to France as a refugee, but died shortly thereafter. was succeeded by Deo Nang Toi.