The Purging of Brookhart

With Bannerfall in chaos and the Rotarian resources stretched with the planetary evacuation underway, the 2nd hive on Rotaria underwent a revolt at the whims of the Cult of the Four Armed Emperor. Swift and unopposed the forces of the cult were easily able to topple the remaining leadership of the Hive.
Relatively no hostile action was needed to take the city and the Death Guard arrived to barren cityscape not 2 days later. Advancing into the center square the Death Guard forces were taken by surprise as the Cult sprung their trap. The Praetorians attempting to secure what they could from the site under fire from the cults forces.
A vicious to and fro ensued between Mortarian's son's and the devoted of the approaching Hive Fleet. Plague Marine and Daemon Engine artillery bombarded the now reveled cultists while Drad'gial chased the cult leaders through the ghostly imperial city. As quickly as it seems their numbers thinned, more cultist appear to fill the ranks. The bodies of their comrades now makeshift cover.
Cult Snipers gravely wounded the Daemon prince before he could land a blow, he fell to the city streets and devoured a group of cultists below as the Patriarch and last of the cult forces reveled themselves.
The Plague Marines and Nurglings had managed to hold of the cult forces to load the supplies as the reinforcements started to overwhelm their positions. Daemon Engines firing missles into cultists and Rocksaws cutting into the oozing plate of the Chaos Predator the backdrop as the Patriarch and seething mass of muscle and dreadnaught faced off in the dust and grime street.
A brutal melee between the Xeno and heretic ensued, the ancient armor of the empire barely withstanding the onslaught from the genetic murder engines first assault, the fallen marine landing two painful blows before being delivered back to the warp.