This gets asked here fairly often. Not to discourage more answers, but you may want to start with these:

https://www.reddit.com/r/AskHistorians/comments/457idw/did_people_in_ancientmedieval_times_suffer_from/

https://www.reddit.com/r/AskHistorians/comments/4i6yxy/is_there_evidence_of_ptsd_in_soldiers_during/

https://www.reddit.com/r/AskHistorians/comments/5980zl/is_ptsd_or_similar_combatrelated_mental_trauma_a/

https://www.reddit.com/r/AskHistorians/comments/4bw9fd/ptsd_in_ancient_up_to_medieval_age/

https://www.reddit.com/r/AskHistorians/comments/1cpusf/is_there_evidence_of_ptsd_in_ancient_warrior/

https://www.reddit.com/r/AskHistorians/comments/1les1j/how_did_the_soldiers_of_antiquitymedieval_times/

https://www.reddit.com/r/AskHistorians/comments/1u1267/did_ancientmed_evil_warriors_suffer_from_ptsd_to/

https://www.reddit.com/r/AskHistorians/comments/2mong3/was_ptsd_any_more_or_any_less_prevalent_amongst/

https://www.reddit.com/r/AskHistorians/comments/tk3nl/did_ancient_peoples_suffer_from_posttraumatic/

https://www.reddit.com/r/AskHistorians/comments/1j6ssm/are_there_any_indications_of_combat_ptsd_in/

https://www.reddit.com/r/AskHistorians/comments/2sib2c/did_men_of_the_past_suffer_emotional_trauma_from/