The Fall of Theza
The Fall of Theza
There are few records remaining from the age before the Imperium came to Theza.
Most were lost.
Others were deliberately destroyed.
What survives now exists only in fragments scattered throughout sealed archives, damaged pict-records and half-forgotten oral traditions carried by bloodlines older than the hive foundations themselves.
Before the coming of the Imperium, Theza was green.
Not entirely untouched by industry or war, but alive in ways modern citizens of the planet would struggle to comprehend. Great oceans covered much of the surface. Vast forests stretched across entire continents beneath warm skies. Independent kingdoms and city-states ruled the world long before the first Imperial vessel entered orbit.
Chief amongst these powers was the Kingdom of Tharos.
Built upon fertile lands near the central western continent, Tharos became the political and cultural heart of the planet. Its royal line maintained authority over much of Theza through diplomacy, trade and military strength long before the Imperium ever learned the world existed.
Then came Old Night.
Like countless human worlds, Theza was isolated during the Age of Strife. Warp storms severed stable travel routes and the planet was left to survive alone. Records from this period remain fragmented, though surviving accounts suggest the old kingdoms endured through brutal centuries of famine, conflict and technological decline.
Somehow, Theza survived.
Centuries later, Imperial scouts entered the system.
According to surviving records, the fleet that rediscovered Theza consisted primarily of Ultramarines reconnaissance forces operating along the outer reaches of Ultramar space during the aftermath of the Horus Heresy and the long reconstruction that followed. The world was brought into Imperial Compliance soon after.
The official Imperial account describes the process as peaceful.
History is rarely that simple.
Theza possessed valuable mineral wealth, most notably vast reserves of Kaolinite buried deep beneath the planet’s surface. The material would later prove highly valuable to Imperial industry due to its role in ceramite production and military manufacturing.
From that moment onward, the fate of the planet was effectively sealed.
Imperial expansion transformed Theza rapidly. Exploratory mining became extraction. Extraction became industrialization. Entire regions were stripped bare to feed manufactorums, foundries and off-world military contracts. Forests vanished beneath refinery districts and crawler routes. Oceans were poisoned or drained entirely to sustain growing hive populations.
The green world died slowly.
And profitably.
The ancient monarchy of Tharos was not destroyed outright. Instead, the ruling bloodline was absorbed into the new Imperial structure. Their authority was stripped away piece by piece until the royal family became little more than ceremonial figures preserved for cultural stability and public spectacle.
The throne remained.
Its power did not.
In the centuries that followed, the Great Houses of modern Theza rose to prominence. Many already possessed influence before Compliance, though it was Imperial restructuring that allowed them to become truly powerful. Noble families that embraced the Administratum, supplied Imperial industry and adapted quickly to the new order prospered enormously.
Others vanished into history.
The Great Houses learned quickly that loyalty to the Imperium was profitable.
Very profitable.
House Voss expanded alongside the growing manufactorums.
House Malrec embedded itself within the emerging void trade networks.
House Tiber aligned itself closely with Ecclesiarchal and bureaucratic authority.
House Khelt drove ever deeper into the planet’s crust in search of new extraction sites.
And House Arellano mastered the movement of everything between them.
By the time the first true hive cities rose above the old world, there was little left of the planet that existed before Imperial rule.
Hive Tharos itself was constructed atop the ancient capital city of old Theza. Layers of steel, stone and ferrocrete buried the old world beneath expanding hive foundations until entire districts vanished beneath industrial growth. Even now, rumours persist that ancient sections of Old Tharos still survive deep beneath the underhive levels, sealed away beneath centuries of expansion.
Most dismiss such stories as myth.
Though on Theza, myths have a habit of turning out to be real.
Today, the world stands as one of the Imperium’s most strategically valuable industrial planets within the region. Massive orbital tethers connect the major hives to sprawling dock stations hanging high above the atmosphere. Endless freight convoys move between extraction zones and refinery districts while millions labour beneath the banners of houses whose wealth was built upon the bones of the old world below them.
Only fragments of Green Theza remain now.
A faded mural beneath a collapsed transit tunnel.
A royal crest buried beneath hive foundations.
Ancient songs remembered by workers who no longer understand the words they sing.
Or the colours worn by the Verdant Blades Space Marine Chapter, whose very name serves as one of the last surviving reminders of what Theza once was.
Before the Imperium came.
Before the world was consumed.
Before the green faded into dust.
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