The Hmong were our "allies." The Vietnamese hate them - ethnically different. The people Kurtz is with in Apocalypse Now were Hmong.
Except for this one apparently.....
The Hmong were some of our special forces best allies. They sacrificed in the Vietnam war in helping us interdict the Ho Chi Minh trail (a network of road systems supplying the communist attack on the south).
We abandoned them to the North Vietnamese when we left causing the deaths of thousands. The ones who are here are the survivors and their families, who our government felt guilty about. Why they settled in the Northern states is a mystery to me. There are many in Green Bay, too.