Coronid Reach - Planets and Domains of the Coronid Reach: Agathean Domain – At the heart of the Agathean Domain lies the sprawling Hive World of Agathon, the most populous planet in the entire Coronid Reach. Conquered by force of arms during the latter days of the Great Crusade, Agathon has since become a highly martial society; most of its inhabitants descend from the original mortal soldiers of the 60th Expeditionary Fleet and have served in the famed Agathean Cohorts of the Imperial Army's Solar Auxilia. Agathon's military might is such that it subjugated nearby worlds like Legatus and Othion and established its own autonomous domain within the sub-sector. It is the local political, industrial and military power and dominates the Coronid Reach in every other regard. It is fortunate for the Imperium that Agathon's ruling dynasty, the MaSade, proved fervent supporters of Unity and the Imperial Truth. During the Horus Heresy, it was through Agathon's and Ireton MaSade's efforts that the Coronid Reach did not fall entirely under the sway of the baleful Traitor Cyclothrathe Mechanicum.AntaykaBitter HoldCerada Trinity – The Cerada Trinity is an alliance of three neighboring star systems to the galactic east of Numinal that derived their name from the Cerada Nebula in which they are located. The Trinity consists of three very different worlds: the Civilised World of Cerada Primus, the Mining World of Cerada Secundus and lastly the Feral World of Quavausari. The Trinity has long been plagued by pirate activities, preying upon the interstellar traffic between the colonised planets Cerada Primus and Secundus. The wealth and power of these two worlds has thus far been enough to guarantee its independence from the Agathean Domain. The pirates' presence has led the Trinity to invest a sizable portion of its production capabilities in sleek pirate-killer vessels which were unfortunately all lost during the Treachery at Port Maw incident. As for other worlds of the Coronid Reach, the Cerada Trinity came under attack by the Traitor Cyclothrathe Mechanicum early on in the Horus Heresy. Nearly entirely subjugated by 009.M31, the Loyalist victory during the Liberation of Numinal would buy its defenders precious time to reorganise themselves and hold out a bit longer.GarellaNuminal – The famed Agri-world of Numinal has provided the Manachean Commonwealth with much-needed nutrient import almost since its inception in the early 900s.M30. Being the only dedicated and exploitable Agri-world within the Coronid Reach, Numinal's strategic value was further increased by the nexus of stable Warp-routes originating there and from which every system within the Reach could be joined. It was for this reason that the sub-sector's sole navigational relay was installed on one of Numinal V's moons, turning the Numinal System into the proverbial gateway to the entire sub-sector of the Coronid Reach. All these factors came into consideration when the Traitors of the Cyclothrathe Mechanicum attacked the system, Numinal's own defence flotilla having fallen during the Treachery at Port Maw. The Agri-world would suffer harshly under the Dark Mechanicum occupation but would ultimately be freed during the famed Liberation of Numinal campaign which would see the Agathean Cohorts of the Solar Auxilia victorious against the inhuman legions of Cyclothrathe Battle-Automata.Vespasia Infernus – The Mechanicum Explorator outpost of Vespasia Infernus is the last known inhabited world in Imperial space before the intergalactic void. Only reachable through one of the minor stable Warp-routes originating in the Numinal System, Vespasia Infernus is an isolated world that has long since learned to rely only on itself.Zarnov – Zarnov is an Industrial World of high standing that lacks the population to be clasified as a Hive World. It is an isolated planet situated to the galactic north of the dreaded Coronid Prohibition Zone, where all travel has been forbidden by Imperial Edict and whose borders are being enforced by hunter-killer Golem-ships. The only stable and therefore most travelled Warp-route leads to the distant Hive World of Keopsis in the Grail Abyss.