Classification: Frontier World
Sub-sector: Drusus Marches, Calixis Sector
Segmentum: Obscurus
Population: ~78 million
Governance: Imperial Navy Strategic Command
Function: Imperial Navy depot, staging post, and strategic stronghold

88 Tanstar is a dry and cold world situated on the frontier of Imperial space. Polar icecaps dominate the poles, while two vast inland seas — Lake Nartha and Voldar’s Hollow — provide the only substantial surface water. The planet’s atmosphere is thin but breathable, and its high-normal gravity (1.1g) exerts a constant strain on the unacclimated.

The equatorial and mid-latitude regions are barren, windswept plains of basalt and frozen dust. Only sparse, cold-resistant flora grows in the valleys. Nutrient-poor soil and glacial erosion leave the surface inhospitable for agriculture, and life clings to geothermal zones and the fertile bands along rivers that descend from the polar icecaps.

The inland seas are brackish and rich with bioluminescent algae and hardy marine creatures, forming the backbone of the planet’s food chain. These are harvested for sustenance and chemical synthesis, primarily by manual crews.

Settlements are coastal or located along rivers. Habitation includes cliffside ports carved into seaside ravines, seasonal riverline encampments, and winter cavern holds in the foothills of the mountain ranges. These serve as havens from deadly storms and harsh winters.

Civilian Aftermath – Survivors in the Shadow of Fire

Two centuries ago, the mining outpost of Fall Narrow became the site of a horrific xenos infestation involving the parasitic Cryptos species. The Imperial response was swift and merciless: orbital bombardment sterilized the primary population centers, including the first colony and central mining zones.

The survivors were left destitute and scattered. With infrastructure destroyed and the surface barren, they adopted a semi-nomadic existence. Communities now survive in cavernous footholds and riverside camps, relying on geothermal energy and maritime subsistence.

Bitterness toward the Imperium simmers beneath a thin veil of compliance. Forced conscription raids, lack of recognition, and the ever-present reminder of obliterated cities have left deep cultural scars. Administratum logs still list their homes as “cleansed and unrecoverable.”

Despite their suffering, open rebellion is checked by the lack of weaponry and the overwhelming presence of the Imperial Navy.

Major characters

Lord Admiral Septimus Ketter

Role: Lord Admiral of Imperial Fleet 22
Vessel: Battleship Invictus Imperator

A tall, gaunt man with iron-gray hair and a glowing red bionic eye. Ketter is known for absolute discipline and methodical fleet formations. Rising from convoy defense fleets, he survived multiple Chaos engagements. Officers say he never retreats—he merely repositions the fleet for final victory.

Fleet Commander Halbrecht Vorn

Role: Veteran Battlefleet Commander under Ketter
Vessel: Battlecruiser Gloria Bellator

Broad-shouldered with ritual scars across his shaved scalp. Vorn is famous for brutal close-range void engagements and torpedo strikes. His crews are fiercely loyal after years of pirate-cleansing wars along the Koronus expanse.

Fleet Commander Lucia Tarsyne

Role: Strategic Commander of Escort Flotillas
Vessel: Cruiser Aurora Imperialis

A sharp-featured woman with silver cybernetic fingers used for command-table interfaces. Tarsyne specializes in long-range fleet coordination across Dusus Marches. She is rumored to have predicted three enemy ambushes before they occurred.

Lord-Commander Cassian Vale

Role: Young High-Noble Frigate Captain
Vessel: Frigate Superbia Valerii

Barely thirty, elegant and impeccably dressed even in void combat gear. Cassian commands through inherited authority but is determined to prove himself worthy of his noble lineage. Many expect him to die in his first engagement—others believe he possesses a rare instinct for void warfare.

Castellan-Commander Bartholus Greim

Role: Commander of the Ramilies Star Fortress
Location: Ramilies Star Fortress Bastion Invictus

An elderly officer sustained by respirator systems and stimulant injections. Greim fought in a crusade alongside the legendary Admiral Flaminius Knake. He rarely leaves the fortress command cathedral and claims the void itself whispers warnings through the sensor arrays.

Field-Cardinal Matthaeus Rell

Role: Ecclesiarchy Spiritual Overseer of Fleet 22
Location: Admiral’s flagship Invictus Imperator

A towering priest clad in crimson vestments reinforced with armor plates. During battle he broadcasts sermons across the fleet vox-net, declaring each macro-cannon salvo a hymn to the God-Emperor.

Quartermaster Dominica Harven

Role: Logistics Master of the Star Fortress
Location: Ramilies Star Fortress supply catacombs

A stern woman with dozens of data-tethers implanted along her spine. Harven oversees the immense stockpiles of torpedoes, ammunition, promethium, and rations needed to sustain the fleet.

Guild-Trader Lothar Ioseph Loi

Role: Independent Trader of Loi Metal Works
Location: Commercial docks of the star fortress
Vessel: Merchant hauler Providentia Mercator

A thin man with gold-rimmed augmetic eyes and immaculate merchant robes. Loi’s manufactorum guild supplies void-grade armor plating and reactor shielding for Imperial vessels. His contracts with Fleet 22 are extremely profitable.

Magos-Auxilia Ferrix-9

Role: Mechanicus Field Weapons Tester
Faction: Cult Sollex
Location: Weapons testing ranges attached to the fortress

A towering red-robed Tech-Priest with mechadendrites tipped with diagnostic probes. Ferrix-9 oversees experimental weapon trials for the Cult Sollex, including plasma-lance prototypes and unstable energy projectors.

Imperial Navy

Orbital Facilities

Star Fortress Tenebris Vigil
A Ramilies-pattern star fortress in geostationary orbit, Tenebris Vigil is equipped with:

Void shields and overlapping defense turrets
Lance batteries and fighter bays
Fleet command spires and encrypted cogitator relays
Garrison for 500,000 soldiers, 300.000 crew and 1,500 combat servitors
Adeptus Mechanicus repair docks

It acts as the central resource nexus for naval activity in the Drusus Marches and a bulwark against voidborne threats. Especially Dark Eldar and chaos incursions from the Screaming Vortex warp storm.

Defensive Flotilla
Three Sword-class frigates orbit in support, maintaining:

Patrol of warp translation lanes
Rapid interception capabilities
Orbital security against pirates, xenos, and saboteurs

Surface Installations

Fortress Tharsis
Perched on a central mountain plateau, Fortress Tharsis is a bastion of Imperial authority. It houses:

Over 20,000 naval personnel
Anti-orbital missile batteries
Tactical command vaults and regimental barracks

Skyhammer Cave
A fortified voidport built into a cliff face, Skyhammer Cave facilitates:

Bulk cargo transfers and deployment dropships
Command-tier mustering
Access for high-clearance visitors

88 Tanstar functions as a launchpad for Imperial Navy operations and logistics into the Koronus Expanse and beyond.

The Fall Narrow Incident & Cryptos Xenos

Fall Narrow’s destruction marked the first recorded contact with the Cryptos species—parasitic xenos capable of corpse reanimation and psychic influence. The Inquisition ordered total sterilization. No survivors or samples remain, and the settlement was erased from record.

No confirmed Cryptos survivors
No trace genetic markers
Possible pre-purge evacuation

Strategic Role

88 Tanstar is essential to Imperial control of the Drusus Marches:

Gateway to the Koronus Expanse
Refit and supply hub for Navy voidships