The most spectacular rescues where when South Vietnamese military airmen flew their families out to sea and tried to land on USN Aircraft Carriers. USN Aircraft Carrier Commanders actually dumped multi-million dollar aircraft INTO THE SEA in order to make room on their flight decks for the incoming South Vietnamese Aircraft.
The boat people came a couple of years later, and those figures will mostly be estimates; as many of those folks are suspected of being lost at sea, and the rest are suspected of "having made it" to some safe landing.
They were the Vietnamese "boat people". Many were rescued by US Navy and other ships and emigrated to the United States after the fall of South Vietnam.
"Vietnamese Boat People"
Vietnamese refugees
1975 onwards.
because they had nothing else to do
I heard some people went to Malaysia
LBJ started the bombing by attacking North Vietnamese Navy torpedo boat bases in North Vietnam; in retaliation for their attacks on US Navy destroyers in the Tonkin Gulf in August 1964.
Cause: The fisherman's boat sank. Effect: The fisherman had to be rescued.
Just like the Pilgrams landing in America in the 1600s; the Vietnamese landed where ever they were welcomed in the 1970s.
The Carpathia rescued the Titanic passenegers that were in lifeboats.
There was a exodus of Vietnamese people called the boat people to Australia and New Zealand.
The northern & western coastal regions would seem a good bet.