Sounds like Aqaba
I'm a writer and have been fascinated by this story since the early 90s when some of the CIA reports were released and I ran across them while surfing. This guy's article is basically a rehash of those CIA documents.
Been trying to find some of the American/Hmong participants over the years for interviews but the Americans won't talk and I can't locate any Hmong who made it to this country.
May turn it into a novel sometime.
Interesting. I worked at the Cam Rahn Bay comm center during all of 1968 and never heard of this. All the encrypted traffic for the command passed through us.