I have spent a lifetime with family that were veterans of WWI, WWII, Korea, Vietnam, WOT, etc.
It seems to be just recently when so many people in our society, have had mental problems that turned them violent.
I note my neice and her husband, both WOT vets, BOTH get compensation for PTSD.
He served ahile in the Army in Iraq, and she served 12 years in the AF.
I have another vet acquaintence, who also has a PTSD disability.
My father served in combat, got seriously injured, but dealt with it. Same with my FIL.
Men used to "deal with it," because that was expected.