The most terrifying sounds of the Vietnam War

A list with some of the most terrifying sounds o the Vietnam War. This list is not ranked in in a way like the higher the more terrifying.

American B-52 bomber
Operation Wandering Soul
American AC-47 Spooky gunship
American jet-powered fighter aircraft
Operation Arc Light
AK-47 and M16 firefight
The jungle and the silence

The most terrifying sound is when the sky starts playing Fortunate Son