Strategic Summary: The Aleph Sector in 025.M42
Segmentum Ultima – A Study of the Wars of Attrition and Expansion
By 025.M42, the wars raging across the Aleph Sector had entered a new and bloody phase. The conflict spanned dozens of systems, from the blighted worlds of the Perseus Deeps to the war-ravaged nebulae of the Zadoc Subsector and the monstrous horrors of the Hadron Expanse. No single faction held the advantage; every victory came at a ruinous cost, and every advance drew a counterstroke from one of the many enemies vying for supremacy in the region.
The Mordecai Campaign – The Steady Hand of General Kutuzov
On Mordecai Primaris, General Kutuzov continued his slow but inexorable advance into the corrupted hive cities of the Chaos-held world. Drawing on the Imperium’s strategic and logistical superiority, Kutuzov’s campaign had achieved a series of deliberate, grinding gains, supported by the combined arms of the Imperial Guard, Adeptus Astartes, and Imperial Knights.
Despite these victories, the resistance from Nurgle’s followers, particularly the Death Guard, remained formidable. The plague-ridden defenders fought with the tenacity of the damned, contesting every street and ruin, forcing the Imperium into a campaign of attrition that sapped men and materiel. Even as the Imperium secured major objectives such as Hamen Spaceport, it was clear that the liberation of Mordecai would be neither swift nor bloodless.
The Perseus Deeps – Veers’ Crusade and the War Against the Necrons
To the galactic north of the Mordecai system, in the Perseus Deeps, General Veers’ Crusade pushed ahead in a separate but equally critical theatre. Having successfully secured Enaloth, Veers now turned his attention to the Necron-infested worlds of Gamordal and Gamador. There, his Imperial forces clashed with the ancient dynasties of the Necrontyr, their tombs slowly stirring to full wakefulness after aeons of slumber.
The battles across these desolate worlds were defined by sudden ambushes, attritional engagements, and the slow wearing down of both sides. The Tau Empire, meanwhile, advanced from the galactic east as part of their so-called Perseus Expansion Sphere, bringing them perilously close to Veers’ line of operations. While both empires sought to expand, their ambitions risked colliding in the near future—a confrontation that could decide the balance of power in the Deeps.
The Zadoc Subsector – Imperial Resurgence and Tau Setbacks
Further spinward, in the Zadoc Subsector, the Tau Empire suffered a string of reversals following their earlier dominance. Under the leadership of General Van Dorn, Imperial forces had rallied and were now conducting a determined counteroffensive. The Dark Angels, who had long defended their bastion-fortress on New Cerberex, broke out in force, reclaiming large swathes of territory and threatening to roll back the Tau occupation entirely.
Meanwhile, the Federal Alliance—including contingents from the Leagues of Votann—remained bogged down on Hylas, locked in protracted battles against the Imperium and the unpredictable Ork incursions that plagued the region. Around the Mabb Nebula, a patchwork of smaller conflicts, covert raids, and sabotage operations continued to destabilise every front, ensuring that even minor victories were paid for in blood
The Hadron Expanse – The Tyranid Menace of Hive Fleet Poseidon
Beyond the Perseus front, in the distant reaches of the Hadron Expanse, a far greater terror was unfolding. Hive Fleet Poseidon continued its relentless consumption of worlds within the Rifts of Hecate, reducing once-thriving planets to barren husks. Neither the Imperium, nor the Tau, nor even the forces of Chaos had been able to halt the xenos advance.
Each world consumed by the Tyranids added to the swarm’s strength, and despite growing alarm across the sector, few powers could spare the resources to respond. Appeals for reinforcements were made across the Aleph Sector, but the great powers were stretched thin—locked in too many wars to adequately face the extragalactic horror that now threatened them all.
Conclusion – A Sector on the Brink
By the end of 025.M42, the Aleph Sector stood at a knife’s edge. The Imperium had regained ground in the Perseus Deeps and the Zadoc Subsector, yet its enemies multiplied and evolved. The Tau Empire still held much of the galactic east, the Necrons stirred to full wakefulness, and the Tyranids devoured the Hadron Expanse unchecked.
As the Emperor’s armies dug in across dozens of worlds, the question remained whether the Imperium’s divided strength could withstand the gathering storm—or whether the sector would fall, consumed by war, xenos, and the long decay of endless conflict.
— Extract from the “Tactica Alepha: A Strategic Analysis of the 025.M42 Campaigns” compiled by the Office of Imperial Command, Aleph Sector.
