From the Optimum Films website:

Around 2000 B.C, the Hmong were a peaceful people living in China. 4000 years later they are a people ravaged by war, and dispersed around the globe. Secret Wars explores a world of Imperialism, Communism, clandestine action, and one of the most feared fighting forces in history. The Hmong were recruited by the CIA during the Red Build up, and the entire race became vital to America’s war efforts during the Vietnam Conflict. "As a result, the population was dessimated", said Dennis McCormack on being interviewed about the Secret Wars in Laos.  

For More Info:

http://www.optimumfilms.com/secretwars.asp