Mataras/The Blood Trinity (Unclassified Worlds, Acheros Salient)

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During the bygone days of the Jericho Sector, this system was known as the Mataras Sisters and was regarded as a jewel of the Imperium. At one time, this system supported four verdant and paradise-like worlds that served as a breadbasket for the planets of the Jericho Sector's core. Since the system is no longer part of the Imperium, it has been reclassified as Unclassified.

The Age of Shadows heralded a slow descent into blasphemy as the abandoned human populations soon embraced barbarity and the false promises of the Chaos Gods. The low point came in 920.M37 when the Deathwatch subjected Mataras IV subjected to the final sanction of Exterminatus. 

The three surviving worlds of Mataras became known as the Blood Trinity, which thrived on internecine conflict and unceasing violence. The Blood Trinity is one of the holdfasts of the Stigmartus, but they fight a never-ending war against their own people to control the. The skulls pile up, and the land is choked with blood.

It is thought that perhaps the rot that took Karlack may have originated here, but exactly how it got into the holdfast of Crusade Command and was allowed to spread isn't understood.

Khazant (War World, Acheros Salient)

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Located close to the temporal anomaly surrounding Vanity, the former Imperial world of Khazant became a renowned corsair stronghold, its oppressed population enslaved to one warlord or another prior to the outset of the Achilus Crusade. 

The Imperial forces marked the world for compliance, anticipating a quick and easy victory. It was not to be. Faced massive organized resistance, the planet became a heavily contested War World, with control of it swinging back and forth multiple times.

Naval analysts working from the Octagon believe that the increasing number of Stigmartus raiders plaguing the Jericho Sector may originate from Khazant. It's is not possible to verify this claim, as the Khazant system is currently unreachable by ship - without resorting to vile sorcery that is. It is as if some malevolent intelligence turns away all vessels who do not make sacrifices in its name.