system
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human
[Warhammer 40k] Is the concept of PTSD a thing amongst common Imperial Guardsmen?
gpt
In one of the Caiphas Cain books it's mentioned that there's a planet called Sigma Pavonis which has a major medical facility where guardsmen who are no longer useful due to combat fatigue are sent to recuperate, enough people have been sent there that "going siggy" has become a colloquialism.

 It's worth noting that you probably won't be sent there until you're no longer useful even as cannon fodder at your commissar or commanders discretion. Also the same planet is major producer of combat servitors which may or may not be related.