Hell Warders

The Hellwarders are a collective made up of a quintumvirate of Space Marine Chapters, including - the Gatekeepers, Knights of the Anvil, the Lightning, Spartiate Marines and the Templars Moline. Created in the early centuries of M36, these Space Marine Chapters were selected by the High Lords of Terra themselves, to be permanently stationed around the infamous dual warp storms known as the Hellgates and protect the worlds of Sector Occident Prime from the constant Chaos incursions that emanate from within. Through their millennia-long vigil, these Chapter have forged bonds of kinship stronger than forged ceramite and will willingly answer one another's call for aid without question.

History
Located in the Segmentum Solar a mere 1,000 light years to the Imperial Throneworld, lies a pair of relatively small, duel warp storms known as the Hellgates. These naturally occurring warp phenomena are riven by warp storms so intense that stellar travel in the region is virtually impossible. Within these hellish realms lies a haven made up of renegades, outcasts and followers of the Dark Gods. Due to their close proximity to Terra and the periodic incursions launched by the Forces of Chaos into Imperial worlds of the vitally important Sector Occident Prime, the High Lords of Terra were forced to take measures to ensure the security of the Imperium's worlds in this region of space and supporting the sector capital and the local Inquisition as needed.