Astaramis is a well-ordered and heavily defended hive world, the largest center of population in the Konor System and a potent symbol of Imperial dominance.
Having gathered significant momentum with their early victories on the outskirts of the Konor System, the armies of Chaos spread out across the region like poison seeping into the blood stream of the Imperium.
A vast segment of the Chaos armada descends upon Astaramis, the most populous planet in the system. With its teeming cities arranged in vast concentric rings, the well governed and prosperous hive world exemplifies the grand dream that is Ultramar. However, even Astaramis’ formidable orbital defence platforms and veteran garrison are not enough to hold back the oncoming tide. The Chaos armada launches waves of magmatic torpedoes, and macro-cannons obliterate planetary fortifications and engulf entire regiments of defenders in searing firestorms. Heretic Astartes and their allies slam to earth in blistering drop pod assaults, blasting apart anything that moves even as they march implacably onwards towards targets of strategic value.
During the Great Crusade, the Ultramarines Primarch Roboute Guilliman made landfall upon Astaramis. In the centuries since, the population has come to regard him as a saint, raising vast statues and temples in his name. Hearts emboldened by the revelation that Guilliman has risen from his millennia-long slumber to defend Humanity once more, they fight on bravely in the face of an unceasing onslaught. From the shrines of Saviour’s Landing to the vast and imposing Quintus Gate, the streets echo with the unceasing chatter of las-fire and the dull thud of bolters and high-explosive rounds.
Yet for all the tenaciousness and devotion shown by the people of Astaramis, they cannot stand alone. With every passing hour, the invaders push further inward, taking hab-block after hab-block. Xenos forces have also been spotted planetside, exploiting the confusion of battle in order to kill, loot or pursue their unknowable ends. Imperial forces have already been forced back as far as the hive’s innermost spires, and the outer districts are little more than a rubble-strewn wasteland. If reinforcements do not arrive soon then Chaos will have gutted the Imperium’s greatest source of manpower in the Konor System, and destroyed a potent symbol of Imperial faith.