Editing Nobledark Imperium Drafts (section)

==== Raid of Cthonia ====

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The Raid of Cthonia was not a strategically important battle in the War of the Beast, but it has long stood as an eerie portent in the annals of imperial history, and may be remembered with hate in the clash of some future war. During the Great Crusade the system spanning ruin had been garrisoned by detachments of both the Imperial navy and army, as well as a contingent of Mechanicus intent on the study of the ancient hub system, and a special Custodes unit nominally present to ensure the safety of the treasures of human heritage. At the time of the Dark Eldar engagement, Cthonia was far from the main theaters of battle, and much of its naval and infantry guard had been ordered into the defense of Old Earth. The raid is notable as the largest single incursion the Dark Eldar have ever made into realspace, and the only time the great tyrant Asdrubael Vect is known to have walked an imperial world. As the siege of Old Earth reached its terrible climax the Cthonian system was set upon by a force of corsairs and Kabalites, first seeming a particularly fierce attack of opportunity, but with the appearance of Crone and Upper Commorragh command ships, then Vect’s own, it became apparent the scale of the assault.

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While significant fortifications had been established on one of the system's rocky inner planets and the foundations and initial foundries of a new forge laid on another in hopes of staging exploration through the system the forces that remained to man them were few. Navy and Mechanicus ships scrambled to secure their orbits against the tide of corsairs. The imperial officers could do little but watch through their telescopes as the Crone and Commoraghi command ships maneuvered to the crest of the golden circlet and made to secure the broken ring set around the Cthonian star. 

Of the Imperial forces present the techpriests were the best armed and in the greatest number, but they received the greater part of the Dark Eldar's attention. The guns of explorator ships and newly scavenged archaeotech illuminated the space around Cthonia III, but even as the darting corsair ships burned in orbit they made for the surface. The orbit of Cthonia rapidly became a dynamic hell of boarding actions and lance fire as incubi and skitarii ripped into each other in fierce engagements that were soon mirrored on the planet's surface. The Commoraghi forces on Cthonia made to plunder the forge of its magos and higher acolytes, while those around Chthonia IV tried to cripple the Imperial military force. The predominantly Voidborn battlegroup successfully held against corsair opening salvos, the remaining imperial army forces on Cthonia IV supported their meagre naval force with surface based lance and torpedo installations and polar weapons platforms. As the third day of fighting on and around Cthonia III dragged to a close the remaining Mechanicus forces retreated first to their ships in orbit, then to their sister world. As they broke from the fray the attacking Dark Eldar made for the crest and their command ships.

The dark battleships of the attacking force's Crone sorcerers and mighty archaeons were moored among the gleaming discharge towers and control domes of the crest facility, the forces of the haemonculus and balesingers they brought with them engrossed in the wonders they were dissecting. Assets drawn from Vect's own fleets and forces manned the shredding guns set up in the installation's spires and the cutters ready to intercept any counterattack meant to dislodge his expedition. In the years that followed Inquisitorial investigators and their illuminate superiors judged that his forces had access to facilities that were integral to the creation and engineering of souls, facilities that housed the stacks of Dark Age Abominable Intelligence that trawled the deep warp, and others that prepared blank bodies for life. The extent of his Haemonculi and sorcerers gained from this endeavor could not be known, and the Magos of Cthonia III was never found. 

As the bloodied forces of the Mechanicus and Imperium regrouped at Cthonia IV under the protection of its surface armaments they made to contact the wider imperium and the Custodes garrison. Attempts to call for aid brought dismay, the latest news was that Sanguinius was dead and the Eternity Gate breached, and no reinforcements could be spared. In spite of this blow it was found that the Custodes still held the focal complex and central repository, and hoped to hold it longer still even as their barricades breached. It took two more days to prepare a meaningful attack force to challenge the Dark Eldar assembled at the crest, and for that time the focal complex and its golden defenders held by power glaive and sword even as they fell back from lab to lab, and dove back into lost chambers to face down witches and horrors that strove to pry forth their lord's very fundament.

The defending Custodes were all but overrun, but enough stood to continue to disrupt the invading Dark Eldar. In later stories of the battle it is said that Vect entered the complex guarded by mandrakes and his personal retainers, intent on ensuring the successful looting and study of this piece of imperial history, and was engaged at some distance by a Custodian wielding a rocket launcher. The remains of the Custodes unit was forced to its final fallback position in the central operating chambers, as well as a handful of holdouts fighting on across the massive complex. Vect was still in the complex when the remaining Imperial and Mechanicus ships entered combat with the corsairs and set course to charge the moored command ships. While some of the Imperial vessels were intercepted, others picked off by the corsairs before they could get the commanding crone ships in range, much of the counterattacking force got in among the enemy fleet, some ramming and others firing their guns until they no longer could.

The great tyrant's personal hasty retreat spared him and his ship. The corsairs fled soon after the first Imperial ships detonated their drives, their Mechanicus crews devoted to the sanctity of the Omnissiah and hatred for such things as haemonculi. The crone ships burned among the emission spires, their blasted wrecks were pinned to command domes by the broken prows of imperial ships. The ships that remained after the initial charge ran down the fleeing pirates until they slipped into the webway, or else entered the crest and threw themselves into the destruction of the straggling Dark Eldar. Even as the remaining Voidborn and Imperial army forces relieved the Custodes unit from their charred and melted fortification there was little celebration. To their best knowledge the Imperium had fallen, whatever their victory was worth, and they braced for the worst. It took another day to establish contact with the Imperial navy, which confirmed the opposite.

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