As swarms of Tyranid bio-beasts surged across the planet's surface, the Imperial transports proceeded toward the hive cities as if it were a routine flight. High above in orbit, the Pectaro aligned its arrays, subjecting the hives and their peripheries to a calculated particle sweep. The devastating lethality of high-energy particles against biological matter caused only negligible interference to the Automated Sentry-Troopers within the ruins.
The sentries completed their extraction with mechanical ease, departing just before the lower levels were inundated by a deluge of xenos ichor of every conceivable hue. In a single stroke, over a third of the hundreds of millions of Tyranids remaining on the world were expunged.
The relativistic particle emitters, while powerful, were limited by their narrow beam diameter, making the purging process relatively slow. Furthermore, the planetary density and crust thickness meant these beams could penetrate only dozens of meters into the surface; they were ill-suited as world-killing weapons, though they proved exceptionally effective against the mindless Tyranid swarms that utilized no cover.
Axion could have used plasma to incinerate the entire planet, but unless he was granted explicit planetary authority, he would not consider turning the world into glass. A vitrified planet typically lost all strategic utility, unless the sole objective was mining. Moreover, Vorchad was not his assigned garrison world; wanton destruction of Imperial property could adversely affect his military merit and contribution calculations.
As the Pectaro returned to Vorchad III to begin the grueling task of offloading equipment, clearing the glassed surface, and establishing manufactorums, the two Imperial scout ships finally reached their limit of curiosity. Following instructions relayed from their command, they transmitted a friendly identification signal to the Pectaro.
Axion responded instantly, following the signal protocols provided by Roboute Guilliman. Simultaneously, he attached a digital copy of his joint authorization documents from the Lord Regent and the Adeptus Mechanicus.
Once the Imperial fleet confirmed they could approach without being targeted, the electrifying news was transmitted back to headquarters. Since the Pectaro had breached the Warp and annihilated a Hive Ship, the pressure on the rear lines had lessened significantly. For over a week, not a single Tyranid bio-ship from the fallen zones had reached the world of Sanctum. This respite allowed Lord Solar Leontus and Trajann Valoris the time to coordinate their forces and thoroughly purge the remaining xenos from that planet.
However, as the strategic pressure continued to mount elsewhere, Leontus was forced to dispatch what few ships he could spare to other war zones to stall the advance of two additional Hive Fleet tendrils.
By the time Axion was fully occupied on Vorchad III, a fleet assembled from the Imperial rear began to mass in the orbit of Sanctum. Having confirmed via the scouts that the Pectaro had visited the "Eternal Night" world of Vorchad, Leontus immediately diverted two-thirds of the orbital fleet into the fallen sectors.
Upon conducting orbital scans of the surrounding systems, they quickly discovered the anomalies within the hive cities of Vorchad. While Tyranid swarms carpeted the surfaces of other planets, the industrial world of Vorchad appeared strangely sparse. The system was littered with the drifting husks of bio-ships, and on Vorchad III, a towering metallic mountain, the remains of the Hive Ship, pierced the very atmosphere.
Even though they had viewed pict-captures of these scenes multiple times, witnessing the reality of such an exaggerated scale was staggering.
Under the leadership of the Lord Solar, the Imperial fleet began its landfall on Vorchad. The empty hive cities reeked with the cloying stench of rotting xenos flesh. The descending Astra Militarum regiments were forced to advance with heavy flamers, incinerating the heaps of decaying Tyranid corpses to clear a path.
Curiously, the surviving Tyranids on the planet seemed to have reached a silent consensus: they would not approach any of the hive cities under any circumstances. This provided the Astra Militarum with the necessary breathing room to deploy.
The landing forces quickly secured every hive city on the planet. Bloodstains, dried and scorched by the intense heat of Axion's earlier purge, appeared as blackened scorch marks across the hive walls. However, when it came time to restore hive functions, they discovered the "favor" Axion's mechanical legion had left behind.
Every hive city was missing critical power infrastructure components. Consequently, none of the hives could generate sufficient power in the short term. Furthermore, the manufactorums within the hives were either sabotaged by the Tyranids or stripped of their heavy machinery by the Iron Man. Despite the mountain-high stockpiles of raw materials in the warehouses, the prospect of self-sufficient production had to be temporarily abandoned.
Driven by necessity, Leontus sought the aid of the Adeptus Mechanicus. At a non-trivial cost, he purchased a cache of spare parts from the nearest Forge World and requisitioned a labor force. After a period of anxious waiting, the Astra Militarum finally welcomed the Mechanicus transport ships. Once the personnel and materiel were offloaded, the tech-thralls and laborers immediately set to work.
They focused on restoring the hive power grids and bringing the least-damaged factories back online. The stockpiled materials were then used to manufacture more components to repair the remaining hives.
Outside the hive perimeters, the Gargoyles, under the direction of synapse creatures, spent most of their time watching the skies. Whenever an Imperial transport flew beyond the hive's immediate defensive envelope, they would swarm it. This bizarre tactical stalemate forced Leontus to order his transports to break atmosphere and re-enter the planet's airspace vertically over each hive to avoid the gauntlet.
The Hive Tyrants overseeing the world were gripped by a predatory wariness; approaching the hives resulted in instantaneous annihilation.
As hive functionality was gradually restored, numerous defense systems were reactivated. The massive defense turrets atop the hive walls soon began scything through the Gargoyles that had been loitering outside with such pitiable persistence.
With a secure defensive foundation established, the Astra Militarum commenced their ground offensive. Valkyrie gunships, covered by the hive batteries, flew daily sorties to bombard the surrounding Tyranid swarms. The Imperial Guard advanced slowly behind a steel wall of Leman Russ Battle Tanks and Taurox APCs.
Though wary of the hives, the Hive Tyrants would never abandon such a concentrated mass of biological assets. Savage battles began to erupt just beyond the range of the hive's defensive guns.
Trajann Valoris led a contigent of Legio Custodes to hunt the planet's synapse creatures. As the Astra Militarum anchored the front lines in a stalemate with the xenos, the golden-armored Guardians of the Emperor swept over the battlefield on their Pallas Grav-attack vehicles and Dawneagle Jetbikes.
These beautiful and deadly golden skimmers, operating in small cells, utilized their Illiastus-pattern bolt cannons or twin Adrathic destructors to clear the path. Closing the distance at high speeds, the Custodians accurately delivered melta bombs or plasma grenades onto their targets. Whether Tyrant Guard or Hive Guard, all were reduced to splattered gore under the rapid strike.
The Astra Militarum utilized their own methods for dealing with synapse nodes—calling in Valkyrie strike runs or concentrating fire from Basilisks and Leman Russ batteries to delete the massive, conspicuous targets. Once stripped of synapse control, the Tyranid swarms would lose all cohesion, collapsing into biological instinct as they either charged blindly or scattered in a panic. The Guardsmen simply dug into their temporary fortifications, fingers locked on triggers, watching as the xenos were chewed into mulch by a relentless wall of fire.