While the war in the Tiamat system would rage for years, the gaze of the Swarm shifted elsewhere.
On the other side of the galaxy, a hybrid Zerg army had emerged. Led by Cerebrate Zasz, this force consisted of a small Hive Fleet supported by a massive contingent of Infested Imperial ships. Although they lacked immediate supplies and long-term reinforcements, they possessed a unique advantage: the element of surprise.
Zasz was far more reliable than the newly evolved Cerebrate Ark. Upon arriving near the Damocles Gulf, he immediately deployed a swarm of Overlords and Eyeworms to scout the surrounding systems. His position was strategically sound—hidden within a barren star system nestled in the no-man's-land between the Imperium of Man and the T'au Empire. Because the system was devoid of resources or habitable asteroids, neither the T'au nor the Imperium bothered to patrol its reaches.
"By the command of the Overmind, our enemies are the aliens known as the T'au. Attack! Swarm!"
The operation began the moment the location of a T'au-aligned world was confirmed. A Leviathan used its short-range warp capabilities to transition directly into the target system. The target was a T'au colony that had once been an agricultural world belonging to the Imperium.
Through the eyes of the Overlords, the Zerg saw a sight that would have driven an Imperial Inquisitor to madness. Human and T'au civilians worked side-by-side in vast farmlands. The two races lived in harmony, and even the Gue'vesa—humans who had defected to the Greater Good—seemed content and well-fed.
To the Imperium, this was an intolerable betrayal. Pure heresy. If the Overmind had a sense of morality, he might have agreed. But Zasz felt nothing but hunger. To the Swarm, humans and T'au were merely different flavors of biomass.
"Begin. Bring victory and conquest to the Master!"
The planet was poorly defended, lacking even basic orbital warning arrays. It seemed the T'au had only recently established their presence here. The Leviathan's massive form broke through the atmosphere, casting a shadow that swallowed entire cities.
"By the Ethereals, what is that?!"
Air raid sirens wailed as the T'au realized they were under attack. Before they could mobilize or equip their pulse rifles, the sky rained fire. Thousands of Zerg airdrop pods pierced the clouds, slamming into the earth with the force of meteors.
The first wave, primarily Zerglings and Hydralisks, erupted from the pods and began the slaughter. Many of the farmers in the fields were former members of the planetary defense force, but they had grown soft in the years of peace. On this remote agricultural world, the Imperial tithe was only collected once every millennium. They were utterly unprepared for a Zerg invasion.
In the chaos, a farmer's wife grabbed her child and fled through the fields. An airdrop pod crashed nearby, the impact throwing her to the ground. As she looked back, she saw a tide of purple-scaled Zerglings rushing out of the wreckage, flanked by two towering Hydralisks.
"Mother!" the child screamed, terrified by the screeching monsters.
The woman scooped up her child and ran toward the nearest town, hoping to reach the armory. She had once served in the PDF and knew how to fight, but the Hydralisks gave her no chance. A volley of needle-thin spines tore through the air. One pierced her back, erupting through her abdomen and spilling her intestines onto the dirt.
She didn't die instantly. The pain was blinding, but she used her last strength to push her child away. "Run, child! Run!"
The boy scrambled away, but a Zergling is far faster than a human child. Two of the beasts darted past the dying woman, their talons clicking against the soil.
"No!" the woman shrieked.
A Zergling pounced, its massive jaws snapping shut over the child's head. Blood splattered across the dirt. A moment later, a third Zergling fell upon the mother, tearing her throat out.
In this dark and hopeless galaxy, such tragedies were commonplace. The Zerg moved with terrifying speed, wiping out every living soul outside the city walls. Only a handful of survivors managed to scramble behind the town's fortifications.
The alarm bells in the town rang out continuously. Despite being a rural world, the local defense forces were surprisingly well-equipped, maintaining weapons that dated back to the Great Crusade era. They donned their flak armor, gripped their lasguns, and rushed to the walls.
The town itself was built around the wreckage of an ancient Lunar-class cruiser that had crashed centuries ago. The central cathedral was actually the ship's converted bridge. While the ship would never fly again, its heavy automated turrets remained a looming threat.
"Vash'ya! Where are you?!" a human officer shouted into his comms, calling his T'au liaison. "Those things are almost at the gates! I need fire support!"
"I am gathering the Fire Caste warriors," the T'au commander replied calmly. "Give us time."
"Time is the one thing we don't have!" the officer retorted. He looked out over the fields. The Zerglings were approaching in a carpet of teeth and claws. "Raise your weapons! Prepare to fire!"
The human soldiers lined the ramparts, aiming at the sea of purple moving toward them.
"Fire!"
A volley of las-fire illuminated the dusk, vaporizing the leading Zerglings. But for every one that fell, ten more took its place. It was a scene reminiscent of ancient terrors—line infantry standing against a tide of monsters.
The free-fire session began in earnest. From the city walls, humans poured continuous fire into the swarming mass below. Civilians rushed to the battlements, bringing old hunting rifles and improvised explosives to bolster the front lines. However, despite their bravery, their firepower was far too thin. The sea of Zerglings was endless, and the Swarm was only just beginning to exert its will.