The Sympathizer/The Committed though fictional have many details that match the stories of different people I know, with the taking off from Saigon airfield while under attack from NVA to others escaping on a boat with only the hope of being picked up by friendlies of some stripe and avoiding pirates or others who could only escape in any case with some of their immediate family and had to get the rest reunited years later. Not a few of the ones old enough to remember the details though are getting scarce simply because of age (some of the people I know were too young to remember anything and had to rely on their parents memories).