Markayn Marches Subsector
The Markayn Marches were an early dominion acquired by the Angevin Crusade. The ancient human world of Solomon had established itself a small domain known locally as the Solomon Empire, covering several dozens of worlds are sending its Praetorian legions to battle against renegade humans and xenos. The Solomon Empire was folded into the Calyx Expanse and provided millions of Calyxian levies to join forces with the Crusaders in several battle groups. Of the different army groups, the 20th were the most famed, built around the personal Praetorian Ducal Legion of Paleologous Sozomen XI of Solomon, D ucal- I mperator, last ruler of the Solomon Empire. The 20th pushed forward into the unknown wildspace north of Solomon, conquering more worlds than all previous Ducal-Imperators with the aid of Imperial troops and technology. The Great March ended at the uncharted world of Cantus Extremis, an uncharted world that turned out to be a trove of nightmarish biological horrors that surged out all the way to the Solomon core worlds, slaying the Ducal-Imperator, the 20th, and several other fleets and army groups. The charismatic Duke Severus was dispatched with a scratch reserve force from the Golgenna Consolidation campaign to hold Solomon and end the Cantus Menace. Duke Severus marshalled the defenders for a last ditch defence at the historic Fortress World of Malatya on the Solomon System fringe, annihilating the bulk of the para-coral attackers in space and then personally led his contingents of Modrian Storm Troopers and Cadian Kasrkin when the xenos made planet-fall. Duke Severus co-ordinated the surviving troops and fleet elements to take back surrounding systems whilst he and his personal flagship jumped into the heart of the Cantus Extremis System, where he risked death in a densely-packed system full of psy-pulse emitting brain coral, clawed and tentacled ship-killers, plasma-venting 'death flutes', and the chemical-spewing 'hull-borers'. Duke Severus made it to Cantus Extremis with his ship literally being pulled apart around him, and ordered the plasma-boiling of the hideous xenos-spawning seas. The Cantus bioforms attacking Severus's ship and those throughout the system died and disintegrated rapidly following the death screeches of the Cantus world conscious. Duke Severus then embarked on a campaign against the ' R emanent', the surviving Solomon officers, clergy, and nobles who had been disgruntled with Imperial reclamation and tried to launch a breakaway state. Severus's battle-hardened soldiers gave no quarter and broke the Remanenters in less than three years. Duke Severus was feted by the Solomonians and was all bout ready to delcare the Severus Subsector when he was recalled to Scintilla to help in the Consolidation. The relatively mediocre Admiral Markayn of Battlefleet Scarus was gifted the Subsector and became its first Governor, ruling from Solomon; Duke Severus would long remember the bitterness of the Angevin Warmasters arbitary decision that cost him his glory.
The expansion of the Markayn Marches continued as lost Solomon Empire worlds we reclaimed and new xenos and human threats were defeated. The decisive battle of Markayn, a moon of a gas giant in the Calistra System, saw Admiral Markayn die in unknown circumstances on the deck of the battleship Angevin's Destiny ; his death may have been an assassination orchestrated by the rulers of Solomon, as was the overwhelming pirate fleet Markayn had been chasing. The Angevin's Destiny turned the tide under its first officer, by no coincidence a scion of one of Solomon's oldest noble lines.
The Markayn Marches were the site of the opening shots of the War of Brass, the large scale insurrection orchestrated by the heretics of the Gelmiro Cluster. The Gelmiroans initiated rebellions all throughout the Marches and wider Calixis Sector, starting a three year conflict that only ended when the Imperium arrived in force in the Cluster, crushing the Emperor of Brass and his followers with Imperial Guard, Titans, and Space Marines, leaving the worlds empty and devastated. The War of Brass permanently put the Markayn Marches on the back foot; the Gelmiro Cluster once enjoyed lucrative trade with the nearby Finial Sector until the War cut those routes off completely. The old Solmon Empire core is still fairly productive, but Spinwards lies only worlds devastated by half a dozen conflicts, clinging to faded glories . The Adeptus Mechanicus is rising in prevalence in the Marches, its three Forge Worlds making it the most Mechanicus-settled Subsector outside the Lathes of the Malfian Subsector.