re: Which War Would Result In The Most Severe PTSD For Soldiers?

WW1, my grandad served during WW1. Went to war as a young black haired 25 yr old, came back as a grey haired 27 year old. Shell-shocked, artillery explosion blew him up in a tree, gassed x2, and was in hand to hand fighting where he bayonetted a German down the throat. Came back and was never the same (they say). But he was my favorite person on earth, died when I was 8.