The Bell UH-1 Iroquois (this tool is not allowing a title for some reason)
Produced from 1956 - 1987, of about 16,000 units
manufactured, 7,000 served in the Vietnam war
mainly for medevac and general utility purposes.
Above is the model of a Huey helicopter
being pushed off the deck of a ship to make
room for more aircraft carrying persons evacuating Saigon. The U.S. Marine helicopters
swooped down to the U.S. Embassy and the roof of a nearby CIA safe house to rescue the last 1,000 Americans in the city and some 6,000 Vietnamese and their families who worked for them during the near end of the Vietnam War.
https://www.npr.org/2010/08/31/129484369/forgotten-ship-a-daring-rescue-as-saigon-fell