My dad was there, one tour in 69, one in 70.
(Black Hawks) Dutchmasters B troop, 1/7 air cav, tail #680, if any of that rings a bell.
He was a door gunner on a slick, then crew chief. I forget the exact places he was, but I know Da-Nang, Dalat, the delta areas... He went in to Cambodia at one...