A thought occurred to me, in relation to my as-of-yet unpublished fantasy writings: Did people react differently to mayhem and death in times gone by? Back when the average farmer grew up knowing they might one day have to defend the farm from brigands?
One of my main characters is a hardened war veteran, and I wrote him with a persistent case of PTSD. Are there any old records that show the mentality of people in medieval or pre-medieval wars?