War of Blood

The War of Blood was an Imperial castigation campaign carried out by both the 501st Cordanian MIR and the Sisters of Battle of the Order of Our Martyred Lady against the large number of Chaos Cultists on the Imperial world of Mortem III. This conflict would prove to be a brutal and bloody affair, but in the end, the forces of the Imperium would emerge victorious.

History
On the planet of Mortem III, the planet was being an attack internally by Chaos Blood cult along with some of their own PDF being converted to the Blood Pacts. Much to the incompetents of their planetary governor, his advisors have told him that they need to get to call in for aid if they are dealing with a Chaos incursion. However did not allow this as he just sees them as a minor nuisance that the PDF can deal with easily. Against his wishes, his advisors have sent a message to Administratum to help in this threat.

He later found out about this and he has greatly angered so he put them in prison and later to be put to death. But regiments came days after and release the advisors before the execution can go through, as they see them doing their duty to the Emperor. The planetary governor was put to death for incompetents and allowing Chaos to take hold of the planet. He was executed by the Senior Commissar of the 501st Regiment and they begin their war against the blood pacts. They would later get additional aid from the Preceptory of the Adepta Sororitas of the Order of Our Martyred Lady.

Though the War of Blood proved to be a brutal and bloody affair, the forces of the Imperium managed to put an end to the conflict and found the World Eaters Terminator Squad that was leading the war. After they lured them to the opening. Several of their heavy weapon squads opened fire on the traitors until there was nothing but a bloody mess.