As a Navy vet, I would have to agree that, in most cases, life is a walk in the park compared to combat duty. But military life in itself, and shipboard life, can involve a lot of singular stresses. You can't just walk away from an extreme personality clash with someone you are assigned to work with daily in a space like a walk-in closet. No one with serious stability problems should be subjected to military life, for his own sake and for that of his fellows.