I grew up in the 1950's. Most of my peer's dads were WW2 and/or Korean war vets.
It never dawned on my until recently that a fair share of them probably had some form of PTSD.
Maybe that's why so many - including my dad who was a green Navy doc in WW2 and 4 years later at Chosin Korea - never talked about their service?
Actually, could have been like my Dad, “it's just what we had to do, besides, we came back. The ones that didn't come back are who we should talk about.”
I never heard a single war story from him except the times he met up with old buddies and I eavesdropped.
When they did have it and we knew it we just called it the shakes. It was clear for some. They never were what we called normal. Many others endured and functioned as best they could but manned up and carried on.