I love that the Catachan have an officer fragging mechanic
For non 40K-Knowers, the Catachan are a Guard subfaction very obviously styled after US troops in Vietnam. If your army includes any commissars, you have to roll a die during deployment to see if they even make it to the battlefield. The rule is called Oops, sorry sir!
Ah yes, I remember fondly the days of school, when someone could fuck with you all day but you were the one causing trouble if you enforced your boundaries. My earliest exposure to the whole “preferring a negative peace which is the absence of tension” thing.