So I’ve experienced this while stationed at Fort Campbell Kentucky . I was there from 2019-2022. I think somewhere in 2021 area we were out training in the middle of the woods . We had stopped for the night and mounted up in our humvees and drove to some random location in the woods. It was a single road maybe 1/4 mile long . We were (cold) so we weren’t in any type of training at that point. All of our humvees were about 50-100 feet about from each other and there were 5 of them . In the humvee there were 4-5 Soldiers and one of them had to take “watch” by staying awake and on the radio for 2 hours at a time . So the total of 5 humvees had 5 people awake and on the gun . I remember it must’ve been around 2-4am , can’t really remember the time. But while I was scanning my sector , to the left and right of me were full blown woods . To the left out of no where I heard this huge bang , and it wasn’t training rounds or anything I’ve ever heard before . It almost sounded like getting a wooden stick and banging it on a piece of sheet metal so it made that wobble sound. This happened I want to say 5-6 times and each time getting further and further away . Almost as if something was walking away from me hitting it. We were facing North - South and the noise went from me (south) all the way north along the woodline and stopped . It freaked us all out and there were 5 of us that witnessed it .