I would guess - and I'm not a psychologist - that their training has a lot to do with it. A large part of the boot camp experience is about breaking down how ne

I would guess - and I'm not a psychologist - that their training has a lot to do with it. A large part of the boot camp experience is about breaking down how new recruits think, and reforming that process into one that goes well with the military mission. They're also regularly evaluated on their mental state, and a large part of the culture is about being able to bottle up most "soft" emotions. So they're very well-trained about how to bury their emotions, and how to deal with the implications of that. Having said that, I think your comment glosses over the high rates of depression, divorce, alcoholism, and mental illness represented in the veteran community. It's all there - it's just often (especially in the last case) well-hidden, as a part of the military ethos. Everyone deals with emotions, even (and especially) military people. They're just much better-trained than you are about how to deal with/delay dealing with it.