That’s not battle fatigue. I’ve seen it up close and personal. I remember one troop just absolutely shell-shocked (a young SF troop, actually). He was totally crawled inside himself and unresponsive, downcast, withdrawn. Sadly, I think the med team did him a disservice by sending him back Conus to Ft Sam. The proper treatment we always said at the time was “3 hots and a cot”. A sane person IS afraid of getting shot, so his reaction was not some mental disturbance. Their actions might have convinced him long run that something was broke inside him. Going back to the battle after rest would have given him another shot at it after reflection.
That’s not battle fatigue. I’ve seen it up close and personal.
We’ve got pictures of Bergdahl chumming it up with his “captors.” In a sane world he would AT MINIMUM face a long stretch in Fort Leavenworth “Turning Big Rocks into Little Rocks.”