Phyleaides Cluster
The Phyleaides Cluster contains numerous Imperium worlds, which became threatened when a Varsine Bloodflock migrated into the Cluster in late M41. In response to the invasion, the Imperium dispatched numerous Astra Militarum Regiments and Imperial Navy warships to defeat the Xenos, but they were stretched to their limits due to the sheer number of Varsine they faced. Because of this, the Imperium could not prevent the deaths of millions of its citizens, and entire Sectors are now at risk of being lost to the Xenos, unless the Varsine's Worldnests are destroyed, which would stop their migration. Though the Dark Angels were petitioned to aid in this task[1a], the Chapter instead traveled to the ruins of their Homeworld Caliban, to stop a plot conducted by the Death Guard and a group of Fallen Angels.[1b]
Sources
