Segmentum Obscurus - Notable Systems: Agripinaa System - The Agripinaa System lies within the wealthy and prosperous Agripinaa Sector, located close to the Eye of Terror. Comprised of eight planets, this vital system was a major producer of military materials for Cadia and was a linchpin in the overall defence of the Cadian Gate. Following the destruction of Cadia at the hands of Abaddon the Despoiler, this system has become a haven for Cadian refugees that have taken refuge upon the world of Chaeros, which has since been renamed New Cadia.Belis Corona System - The Belis Corona System is a system of Imperial space located within the Belis Corona Sector near the neighboring systems of the Cadian and Agripinaa Systems.Belial System - The Belial System was a system of Imperial space located to the northeastern region of the Cadian Gate. It was home to the planet of Belial IV, a former Aeldari homeworld that was pulled towards the Eye of Terror during the Fall of the Eldar and became a Crone World, deserted and abandoned.Chinchare System - The Chinchare System is a rogue system comprised of nearly a dozen worlds. During the 13th Black Crusade, the beleaguered forces of the Imperium found themselves unexpectedly assaulted by the sudden materialisation of Aeldari forces throughout the sub-sector.Dhobash System - The Dhobash System is a system of Imperial space comprised of five worlds that was devastated by the massive incursion of the Forces of Chaos during Invasion of the Stygius Sector during the 13th Black Crusade.Gildar System - The Gildar System is a star system in the Segmentum Obscurus of the Milky Way Galaxy and it possesses an astonishing wealth of natural resources. The system consists of eight worlds, most of them uninhabited. The Silver Skulls Space Marine Chapter considers the system to be a part of their territory and no Imperial starship can travel through the area without their permission or escort. The world of Gildar Secundus was the site of a vicious battle between the Silver Skulls and the Red Corsairs Renegade Space Marines for control of the region known as the Gildar Rift. The Silver Skulls proved victorious and drove the Red Corsairs from the system, but at a very high cost. The Captain of the Silver Skulls' 4th Battle Company, Daerys Arrun, was slain in close combat by the Red Corsairs' infamous Chaos Lord, Huron Blackheart.Hydra Cordatus System - The Hydra Cordatus System was home to the desert Forge World of Hydra Cordatus located in the Segmentum Obscurus near the Eye of Terror. It was one of the few locations in the galaxy where the Adeptus Mechanicus stored its tithes of Space Marine gene-seed, in this case of the genetic material drawn from the Imperial Fists Chapter.Istvaan System - The Istvaan System hosted two of the most infamous battles of the early Horus Heresy, the Isstvan III Atrocity and the Drop Site Massacre of Isstvan V.Kharon System - The Kharon System is a system of Imperial space located in the Segmentum Obscurus.Khravos System - The Khravos System is a system of Imperial space that was devastated by the massive incursion of the Forces of Chaos during the Invasion of the Stygius Sector.Mordian System - The Mordian System is a system of Imperial space that was devastated by the massive incursion of the Forces of Chaos during the Invasion of the Stygius Sector. This system is home to the famous Mordian Iron Guard regiments of the Astra Militarum.Nachmund System - The Nachmund System is a system of Imperial space located in the Segmentum Obscurus. It was one of the few systems that possessed an intermittent passage through the Great Rift to the Imperium Nihilus, known as the Nachmund Gauntlet.Prismata System - The Prismata System is a system of Imperial space that was devastated by the massive incursion of the Forces of Chaos during the Invasion of the Stygius Sector.Salamar System - The Salamar System is a system of Imperial space that was devastated by the massive incursion of the Forces of Chaos during the Invasion of the Stygius Sector.Thracian Primaris System - The Thracian Primaris System is a part of the Helican Sub-sector, a notable sub-sector of the Scarus Sector.Urtek System - The Urtek System is a system of Imperial space that was devastated by the massive incursion of the Forces of Chaos during the Invasion of the Stygius Sector.