“When the traitor’s hand strikes, it strikes with the force of a Legion.”– Warmaster Horus Lupercal
Treacherous vassal governments, led by seditious planetary governors, occasionally attempt to break away from the Imperium and claim independence. With so many worlds and such vast distances between them, a planet and its people may forget the Imperium exists or come to believe its reach cannot touch them so far from ancient Terra and the God-Emperor.
These false beliefs invite the Imperium’s wrath upon on any human world which accepts them and rejects the mastery of the God-Emperor. Imperial retribution falls on any world that chooses to either refuse to pay its tithes or proclaims itself independent.
The Imperial Guard often deals with such rebels, crushing all resistance and destroying the leadership which brought them to such a place, leaving behind a battered and war-ravaged world with a heavy debt to be repaid to the Administratum and the threat of complete annihilation should they transgress again.