Defence of Asteria

The Defence of Asteria was a massive Imperial castigation campaign carried out by a coalition of Space Marine Chapters, including: the Astral Warriors, Avengers of Arathorn, Battencian Heralds, Blades of Terra, Storm Sentinels and the Templarii Scientae to defend the beleaguered Asteria Sub-Sector from a newly awakened Necron Dynasty. To compound matters further, the sector was also under siege by hidden Chaos Cultists forces, which sought to spread mayhem and anarchy throughout the worlds of the sector.

History
After their Holy crusade against a nearby system under the control of a local chaos Empire, the Asteria Sub-sector is invaded by a recently awakened and nearby Necron Dynasty while Chaos guerrillas were raiding some planets. In this hour of need, the Astral Warriors and other members of the United Enclaves Alliance called for their outside allies. The chapters who answered the call were the Templarii Scientae, Battencian Heralds, Sons of Galastram, Avengers of Arathor and the Storm Sentinels. The Dynasty was repelled and the Chaos guerrillas stopped after the Imperial forces fought together against them, at the cost of the Blades of Terra Chapter being now dangerously close to extinction and the Stellar Fists becoming the Warband known as "the Pestilent Fists".

With the opening of the galaxy-spanning warp rift known as the Cicatrix Maledictum, the Imperium of Man has been split in two. As the Immaterium has flooded into reality and thousands of worlds are beset by the Forces of Chaos as well as legions of Daemons, the Imperium seems to be surrounded on all sides, as vile xenos come forth, sensing the weakness of a dying foe. Now the defences of Asteria are fragile as ever, as they face even more threats in the forms of the vile xenos species - such as the Orks and the Drukhari - both which have begun to show themselves in the sub-sector.