The Manachean Commonwealth is a conglomerate of advanced and populated worlds that lies at the border of both the Segmentum Obscurus and the Ultima Segmentum. Established in the early millennia of the Dark Age of Technology, the Commonwealth is first and foremost comprised of the sprawling Hive Worlds of the Manachea System and the neighbouring Imperial Navy Sector Headquarters at the fortress of Port Maw. Since the days of the Great Crusade and its liberation from the baleful rule of the xenos empire known as the Mitu Conglomerate, it is arguably the most strategically vital area of the entire Coronid Deeps. By the end of the 30th Millennium, the Commonwealth was perhaps the preeminent power within the Coronid Deeps. This led the Traitor Warmaster Horus Lupercal to personally lead the con