Segmentum Obscurus

The Segmentum Obscurus, also known as the Segmentum Obscura, is the region of Imperial space to the galactic north of Terra. This Segmentum of the Imperium of Man is the home of the vast permanent Warp Storm and Warp rift called the Eye of Terror. The Imperial Army's Segmentum fleet headquarters is located in the Cypra Mundi System, which also serves as the central headquarters of the Imperial military's Segmentum Command.

Notable Worlds

 * Certus Minor (Cemetery World) - Certus Minor is the homeworld of Theoderaf and the main recruiting world of the Red Eyes.
 * Han (Feudal World) - Han is the homeworld of the Jade General and the main recruiting world of the Warriors of Peace.
 * Nyumbani (Jungle World) - Nyumbani is the homeworld of Kubwa-Chui-Khalfani and the main recruiting world of the Stalking Leopards.
 * Maaparatiisi (Death World) - Maaparatiisi is the homeworld of Aato Vayrynen and the main recruiting world of the Sky Reavers.
 * Aehiri (Forge World) - Aehiri, located close to Certus Minor, is a Traitor Forge World tied to the Red Eyes, specialising in radiation weaponry.
 * Aumet (Civilised World) - Aumet was a Civilised World near Certus Minor, and the recruiting world for the Aumet Revolutionary Army regiments in the Imperial Army.
 * Iroruki (Civilised World) - Iroruki was a Civilised World near Certus Minor, one of the first worlds conquered by Theoderaf and made into a recruiting world for the Red Eyes.
 * Valtigar (Ice World) - Valtigar is the domain of House Caraxes.
 * Xei'An (Forge World) - Xei'An, located in the Han System, is a distant Forge World tied to the Warriors of Peace. It specialises in producing weapons for the legions.
 * Cahonides (Forge World) - Cahonides is a Forge World founded during the Halcyon Age by the Mechanicum and Warriors of Peace. It formed a vital world for the defence of the Qui-Tan Domain, as it produced large numbers of automata.
 * Ramien (Death World) - Ramien, brought into compliance by the Warriors of Peace, became the main recruiting world for the 914th Cohort of the Solar Auxilia, the Ramien Celestials.
 * Zayth (War World) - Zayth, brought into compliance by the Warriors of Peace, became the main recruiting world for the Zayth Regiments of the Imperial Army.
 * Xulvilia (Agri World) - Xulvilia is the domain of House Kaigan.
 * Tanika (Frontier World) - Tanika started as an Exodite World, but after being conquered by the Warriors of Peace at the beginning of the Halcyon Age was turned into the domain of House Tyrinth.
 * Mezoa (Forge World) - Mezoa is the most important and preeminent Forge World of the Mechanicum within the Cyclops Cluster, a zone of space located in the galactic north of the Gothic Sector of the Segmentum Obscurus. Mezoa upholds strong ties with its inceptor, the great Forge World of Lucius, from whom it originated.
 * M'Pandex (Forge World) - M'Pandex is a Forge World located in the Gothic Sector, and is a major Forge World for the whole Cyclops Cluster.
 * Lucius (Forge World) - Lucius, known as "The Hollow Forge," is a Forge World and home to the Legio Astorum, a Titan Legion, that is also known as the "Warp Runners."
 * Satyraes XII (World) - Satyraes XII is the domain of Legio Defensor.

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