Editing Imperium Asunder Campaigns (section)

===Siege of Luna===

005.M31: Judgement Bringers and Paladins of Kor are deployed as part of the first wave on Luna, with Judgement Bringer forces forming the fortifications and manning the artillery while the rest of their forces ostensibly rotate in. The Paladins bear the brunt of the casualties, alongside forces from the Storm Hammers.

006.M31: The Silver Spears and Eyes rotate in, alongside Sky Serpents and Fists of Mars forces. The Paladins are beginning to be rotated out, but the Fists are redirected to Mars.
Massacre at Cadia goes down.

The full extent of the Heresy is revealed as the Paladins, Hammers, and Knights expeditionary force is exhausted and daemons take the center stage.


To jump over to the Oathsworn, I'm thinking once the heresy breaks out in earnest and Terra comes under siege, Faustus pulls out the stops. He'd been figuring that the Emperor and Malcador would bring an end to this nonsense. Kor and Enoch were both fools, but when the magnitude of the betrayal is revealed, Faustus pulls his really weird experiments, the ones that pushed the bounds of acceptability, things of the sort that the Warmaster had accused him of having.
Simultaneously, the betrayal at Cadia doesn't go quite as well as Enoch had claimed it would, with rumors of Oramar's interference.
This diverts the Warmaster's resources from the Sol System, meaning that Faustus gets some breathing room and starts launching meteors to Terra.
This is where we end up with Silent Knights fighting daemons while riding on gene-dragons.
Faustus manages to get in touch with Sinistrum on Mars, but Sinistrum is doing everything he can to keep the red planet from falling as it is.
The Battle for Terran Orbital space is insane, with the fronts shifting based on orbital alignments of Lunar and Terran anti-ship weapons and the positions of orbital plates and weapons platforms. So it is in the skies of Terra that the Angels and daemons fight as stars fall from he the skies.
Battles rage at a thousand forts on both worlds as forces seek ways into the heart of the loyalist centers of resistance and the daemons just keep coming.

That's what's etched into the Oathsworn psyche, visions of a mad battle, holding positions for other legions to take up. It happens, finally, but in the end, the Warmaster infiltrates the palace somehow and assassinates the Emperor, the rest of the traitor legions having done their job and kept the loyalists at bay for long enough.