Yes and Homer's Odysseus can be read as an allegory of PTSD. So pretty old.
Edit: The quote is followed by "Everything about this claim is still controversial(...)"
Edit: The quote is followed by "Everything about this claim is still controversial(...)"
So might be some form of survival bias at play.
Why would you say that?
There were a lot of minor conflicts in the middle ages. Not everything was as big as the crusades.