Amen, cannot forget the many missions being inserted and extracted by these now 'classic' birds in '67/'68.
This sassy looking bird from Fireball Aviation of the 199th Light Infantry Brigade.

Love the Huey, get that feeling in my gut hearing them in movies or videos. That wop-wop of one flaring and feathering for a landing you can feel deep vibrating your soul. And the earth shaking roar and vibration of multiple birds on a patrol mission is hard to forget.

I know, just another boomer trying to live in the past, but Air Mobile troopers know exactly what I wax on so eloquently of. lol.
I assume that all of us who relied on helicopters in the past feel a lot when we hear one passing by overhead now, but for those who rode them onto the battlefield the sound must stir incredibly intense sensations and memories, yet I have never seen an in depth article on it.