After the immense focus on the mental damage taken during World War 1, I was wondering if there is any records of soldiers suffering PTSD or similar during the middle ages or the napoleonic wars?
There's a lot to be said on this topic so don't let the following discourage any new contributions, but a similar question (albeit concerning ancient soldiers) appears in the VFAQ (or very frequently asked questions). Check out the Soldiers & Fighting header for an answer from u/Iphikrates.
Likewise, the Military History section of the FAQ has an entire section dedicated to PTSD through the ages which features work by u/Caherdaniel and others.