Konor - The Plague Wars: When the Plague Wars began, Ultramar burned. The putrid warbands of the Death Guard, led by the Daemon Primarch Mortarion, launched a furious assault upon the Ultramarines' stellar empire. This eruption of all-out war threatened to drown the stars themselves in bloodshed and terror. Legions of Heretic Astartes and Chaos-spawned monstrosities have already rampaged across world after world, spreading the malignant corruption of the Dark Gods in their wake. Yet all hope is not lost. The return of the Primarch Roboute Guilliman to the region with the end of the Indomitus Crusade has stalled the seemingly unstoppable momentum of the Chaos advance. In a series of bloody battles, the armies of the Imperium -- reinforced with mighty Primaris Space Marines -- have reclaimed many worlds thought lost, forcing their hated foes to retreat and regroup.The worshippers of Chaos sought to regain their advantage by smashing a path through the Imperial battle line to Macragge, homeworld of the Ultramarines. Had they succeeded, the greatest Imperial stronghold in the sector would have been gravely threatened, and Guilliman's forces cut-off and surrounded. To achieve this end, the Forces of Chaos had to conquer the well-located Konor System. Powered by the industrial might of the Forge World of Konor, this centre of produce and production feeds the Imperial war machine with vital shipments of munitions and machinery. Populous and prosperous, with a large and well-equipped defence force, the Konor System embodies the glorious dream that is Ultramar. Crucially, it also guarded one of the few stable Warp transit routes to the Macragge System. If the Chaos advance was not halted, Konor would have fallen, and a path to the heartland of Ultramar would be laid bare to the forces of the Ruinous Powers.Yet the warriors of the Adeptus Astartes had no intention of ceding their rightful domain without a fight. The Ultramarines stood against the Chaos onslaught with nobility and courage, smiting the foe with Bolter and blade. And they are not alone. The military sledgehammer of the Astra Militarum rumbled into action, an armoured fist of devastating tank columns and endless regiments of soldiers that ground all before it into ashes and dust. Scattered Space Marine Chapters rushed fresh reinforcements to the war zone, seeking to aid their embattled kin. Enigmatic Tech-priests of the Adeptus Mechanicus sent forth their legions of steel, and mighty Imperial Knights bestrode the slaughter like ancient gods of war.Every single warrior -- every Bolter round and bomb -- was vital, for the Chaos host sweeping across the Konor System was vast beyond imagining. Warriors of the Death Guard marched implacably forward, enemy fire spattering harmlessly from their rusted, ancient Power Armour and pallid, twisted flesh. In return, they unleashed bombardments of noxious toxins and flesh-melting plagues. Daemonic legions surge alongside the Chaos advance, exulting in the chance to wreak torment across the material realm. Warbands of Heretic Astartes, millions upon millions of depraved mortal Chaos Cultists, and a thousand other horrors converged upon Konor, drawn to its aura of agony and death like sharks to blood.Circling this firestorm of destruction were predatory xenos races, ever seeking to further their own mysterious ends. Orks surged into the war in their millions, delighting in the spreading carnage. Craftworld Aeldari and Drukhari circled from afar, offering their services as mercenaries to both sides or launching raids to fulfill some unknowable agenda. Tyranid and T'au forces spilled in from the Eastern Fringe, capitalising on or drawn by the escalating conflict, while even the Necrons sent undying invasion forces to exploit the infighting of the younger races and expand their ancient empires.No part of the Konor System was left unscarred by the war. If the Heretic Astartes' plans came to fruition, the system's own worlds would have been weaponised and turned against Ultramar. The Forces of Chaos intended to force open a route to Macragge, and that shining light of the Imperium would face obliteration.As a Forge World, Konor is a vital cog in the war machine of Ultramar, its sprawling manufactorum districts pumping out a ceaseless stream of weapons, ammunition and battle tanks.Konor is the manufacturing and fuel-producing capital of its eponymous system, and thus this Forge World was a vital target for both Imperial and Chaos forces during the Plague Wars. The Death Guard and their allies assembled a vast invasion force for the conquest of the planet, including detachments of xenos mercenaries and millions-strong hordes of fanatical cultists.Manpower was vital in the attritional conflict to come. The Chaos assault on Konor opened with an apocalyptic orbital bombardment, plague-ridden Space Hulks and Chaos Despoiler-class warships ravaging the holdings and armies of the Adeptus Mechanicus with waves of inferno missiles and toxin cascades, churning the planet's atmosphere into a hellish cocktail of flesh-melting viruses and choking smoke. Almost half of Konor's industrial capability was utterly demolished during the initial assault, and the invaders landed an increasing tide of troops planetside. The prodigious level of destruction was judged appropriate by the Heretic Astartes commanders responsible for prosecuting the slaughter, for even with so many manufactorum districts shattered, Konor was still capable of pumping out colossal quantities of battle tanks and munitions. With the billions of slaves claimed by the invasion fleet put to work in the manufactoria, the Forge World would produce even more still should it fall under Chaos control.The Imperium of Mankind's war effort in the Konor System, and indeed the wider conflict raging across Ultramar, would be severely derailed if Konor was lost to Chaos. Thus, the Imperial High Command authorised the despatching of several armies to relieve the besieged defenders. Archmagos Gother Zymus and his Skitarii Legions yet retained control of Forge Temple Cladis and its surrounding domain, and were aided in their stubborn defence by the Imperial Knights of House Raven. Yet outside their rapidly receding kill-quadrants and excoriation zones, the enemy pressed ever closer, with heavily armoured assault troops and Daemon Engines grinding their way through the shattered innards of manufactorums and hab-arcologies. In this hellish no man;s land, squads of dead-eyed killers stalked the choking sprawl for fresh prey, looking to secure key objectives such as Vox relays, Promethium refineries and precious intact generatorums.After days of bloody fighting, the Imperium regained control of Konor. Its sprawling manufactorum districts were soon pumping out fresh munitions and weapons once more for the Imperial war effort.Their armies reinforced by fresh conscripts and supplies after the victory at Astaramis, the Konor System's defenders entered the raging battle for the Forge World of Konor with eager fury. They found themselves battling through a nightmarish hellscape of industrial devastation, a maze of shattered manufactorums and debris-strewn labour-halls where they were as likely to be sliced into pieces by malfunctioning machinery as they were to be slain by one of the roving bands of Chaos marauders that haunted the ash-choked streets.Worse still, hordes of opportunistic Orks had descended upon the stricken Forge World, seeking to strip as much scrap metal and fuel as possible from Konor's vast reserves. These violent looters were equally dangerous to the forces of the Imperium and the Chaos invaders, as they rampaged across Konor in their smoke-spewing war machines, hacking and bludgeoning to death any unfortunate enough to cross their path.Nevertheless, the soldiers of the Imperium went about their task with grim courage, pushing through the ravaged districts towards vital strategic targets. In a bloody and attritional grind, elite units of Adeptus Astartes warriors forced back their hated foes, the Traitor Marines. Terminator and Aggressor armour clashed and sparked under ceaseless volleys of Bolter fire, and Dreadnoughts and monstrous Daemon Engines rumbled through the carnage, crushing and blasting the life from their foes. Many heroes fell in this crucible of slaughter. Yet, with freshly bolstered detachments of well-armed Astra Militarum veterans at their side, the Loyalist counter-assault overwhelmed the embattled Chaos forces.Though victory came at a heavy cost, Imperial control of Konor was secured, and a sizeable percentage of its precious production capability remained operational. Within solar hours of the battle's end, the Forge World's recaptured manufactorums and assembly halls were sanctified with machine blessings and reactivated, and began to churn out vital equipment and machinery for the escalating war effort across Ultramar.