The Imperius Reavers are a 4th Founding Successor Space Marine Chapter of the legendary Ultramarines, created sometime during the 32nd or 33rd Millennia. The Chapter's homeworld is the Hive World of Praedis Zeta in the Vidar Sector, which is located in the Eastern Fringe of the galaxy at the farthest edge of the Ultramarines' Realm of Ultramar. This volatile region is under constant siege by the twin threats of the alien and the daemon. The Imperius Reavers Space Marines are adept at hunting aliens, having been embroiled in many wars with the Tyranids in years past. Their 2nd Company, know on Praedis Zeta as "The Stormbringers" are veterans of the First Tyrannic War and experts in rooting out Genestealer hybrids.