IIRC, the CIA convinced the Hmong to fight for them against the communists in southeast Asia, and promised to take care of them if it all went south. Well, we all know how the Vietnam war went, and while a government that was very unhappy with the Hmong for siding with the CIA was taking over, the CIA basically threw deuces and vanished on them. So shocking and uncharacteristic of the US to betray an ally, I know. So, the Hmong fled to Thailand and begged the US for aid. I’m sure we’ll get the duality of tankie responses (nobody was treating them badly but if they were they deserved it), but the gist is that they were seeking refuge. A few years later, the US granted it. Now, bear in mind, originally they’d been told they were going to be able to have their own farms and fuck off to nowhere and mind their own business. Uncle Sam basically dumped them in Merced, California, patted himself on the back, and walked away. There was a lot of drama about it for a while, because the locals got real upset that this entire population just showed up basically overnight and seemed to resist integration, and the Hmong were upset because they just wanted to fuck off and mind their own farms. Fifty years later, though, the Hmong are a pretty big deal (in a good way) in the community, so that’s cool.