You might be interested in some previous threads from the FAQ section on "Post Tramatic Stress Disorder before the modern era" as well as a recent search:

General

• How did the soldiers of antiquity/medieval times deal with the inevitable PTSD type issues that come from brutal hand to hand combat? - 147 comments, over 1 year old.
• More examples from all across time, with analysis and source criticism present in several of the comment threads.
• Was PTSD any more, or any less, prevalent amongst ancient and medieval soldiers than todays soldiers? - 16 comments, over 2 months old.
• This thread delves into a discussion of the merits and flaws of an often cited work on PTSD amongst pre-modern warriors.

Ancient

• Did Ancient peoples suffer from Post-Traumatic Stress Disorder or similar psychological issues? - 55 comments, over 2 years old.
• There's a wealth of examples drawn up in this thread though not as much analysis.
• Is there any information on Post-traumatic Stress in societies in which warfare was looked at in a more favorable light (e.g Sparta)? - 41 comments, over 2 years old.
• The topmost comment draws examples from the thread above this, but down below there's a source brought in to analyze pre-modern combat which results in a debate both about such occurrences and the value of the source.
• Are there any indications of combat PTSD in societies like the Spartans, Khan's or Alexander's armies? - 31 comments, over 1 year old.
• This thread narrowly focuses on Roman soldiers and thus is able to do strong analysis of the available texts and evidence in a way not done in the threads above.
• Is there evidence of PTSD in ancient warrior cultures? - 14 comments, over 1 year old.
• A few more examples ancient examples as well as dealing with a book on the topic of PTSD.
• Did men of the past suffer emotional trauma from war and killing? - 6 comments, less than 1 month old.
• This thread goes deep into the source criticism and interpretation when making judgements of whether or not pre-modern peoples were experiencing what would be diagnosed as PTSD in the modern day.

Medieval

• Did soldiers in the middle ages get PTSD? If so, was it different then PTSD now? - 83 comments, over 2 years old.
• There's some debate in this thread whether or not the circumstances that people lived in during the Middle Ages made them more resilient or not to PTSD.
• Is there any mention in medieval books and records from those times of what we now call PTSD in knights, soldiers, warriors etc? - 9 comments, less than 1 month old.
• There's one large quote given in this thread about how clergy specifically cited the psychological toll of combat as a reason against it.

Early Modern and Modern

• How was PTSD (Post-Traumatic Stress Disorder) treated in the Middle Ages of Europe (or anywhere during 400A.D. to 1500A.D.)? How well documented are we upon the subject? - 26 comments, over 10 months old.
• Despite the title, this thread focuses on Early Modern Europe and also deals with the difficulty of retroactively diagnosing people through their writings.
• How common was PTSD in 18th and early 19th century armies? Particularly in Napoleon's armies - 4 comments, over 11 months old.
• One commenter talks about a high level officer who may have experienced PTSD such that it impacted his decision making at a critical moment in a major battle.