Hasn't Hollywood made a film about this recently?
Are they not approaching it from the wrong angle? The training before qualifying, and most of all the grading and screening beforehand should rule out people who are simply not suitable. Did they look at this in the grading?
Condition people to it better? If that is even possible.
Shorten the tours? Insert compulsory breaks and further psychological screening?
It must be awful, an awful job.
Think the person who suggested bars and having a few drinks to talk it out a bit is bang on the money. The villages around my way had many working men's clubs which converted into Comrades Clubs shortly after WW1. An awful lot of stuff was talked out by ordinary men over pints among their fellow old comrades. Its old fashioned but to a large degree it actually worked very well.
Nothing at all to do with this but a story. Mother' family lived next door to a harmless chap who happened to be a Army reservist in 1939. He was called up and sent to France, from where he was evacuated at Dunkirk. He was so horrified and traumatised by what he had seen he was immediately discharged and returned home, where he spent five weeks upstairs in his bedroom, lying on his bed, curtains closed. Gradually, he ventured out and back into some sort of normality.
So perhaps conversely an entire break from all military routine and life is also an answer?
But I know nothing. Truly hope these people are well looked after. They're doing this for us.