Endymion Prime

Endymion Prime is a blighted Industrial World located in the Endymion Cluster within the Badab Sector of the Segmentum Ultima. During the Badab War the brutal and savage Carcharodons are unleashed upon the worlds of the Endymion Cluster in order to cull the Mantis Warriors in order to protect the flank of the Loyalists as they turned their full force to the invasion of the Badab Sector. The Carcharodons systematically annihilated planets in the Cluster known to have harboured the Mantis Warriors, forcing the Secessionist Chapter to stop using their hit-and-run tactics and mass their forces in defence of these worlds, a strategy that spared the Carcharodons from having to pursue them across the Cluster to places where their foes held the advantage of support and local knowledge. Each battle forced the Mantis Warriors to come to the aid of the beleaguered worlds, destroying the Mantis Warriors' ability to affect the war. Now worn down and scattered, the Chapter had ceased to exist as an effective fighting force but at a great price. Unfortunately for the ravaged people of the Endymion Cluster, this would not be the only time when calamity was visited upon their doomed worlds, for the Carcharodons would yet return in later years to enact a final act of savagery against them in the aftermath of the conflict.

History
As with many worlds in the Endymion Cluster, human habitation of Endymion Prime can be traced back at least to the late M34, with it reaching it apotheosis around M38 as the region's only industrial sub-hive world, (although never attaining the scale and population of either Cygnax or Badab Primaris elsewhere in the Maelstrom Zone). Subject to privation and attack owing to its proximity to the Maelstrom on numerous occasions, the planet suffered economic collapse and decline ca. M39 when its primary natural resources were exhausted, its population and capacity shrinking over the centuries to its current parlous state.

By 910.M41, during the sector wide insurrection known as the Badab War, the Loyalist commander, Carab Culln, ordered the deployment of the savage Carcharodons Chapter to subdue the worlds of the Endymion Cluster to prove their worth. Here the Mantis Warriors, guided by the potent divinatory powers of their Chief Librarian, Ahazra Redth, had been holding out by conducting a protracted and highly effective guerrilla war against the Loyalist forces. The Carcharodons descended upon the unsuspecting worlds of Endymion with shocking fury, destroying the Mantis Warriors' ability to affect the war and soon forced their final surrender. Appalled by the actions of their allies, the Fire Angels withdrew their remaining contingents from the conflict and returned to their homeworld to rebuild their shattered Chapter.

In the Badab War's aftermath, in 913.M41 the imprisoned remainder of the Mantis Warriors can only watch as a great swath of the Endymion Cluster's young males are culled by the Carcharodons, taken as potential initiates to replenish their losses in the war with many of the Mantis Warriors' secret bases and caches of wargear are found and ransacked. Afterwards the Carcharodons fleet departs towards the edge of known space.

Departmento Cartographicae Planetary Database
The estimated population of Endymion Prime in 907.M41 is 1.1 billion indigenous human-Imperials and Abhumans.
 * Clase: Tellurian (Rotation 18 standard hours, 0.9G, 0.85 tm)
 * Tithe Grade: Exactus Minoris (Formerly higher previous to economic collapse ca. M39)
 * Climate/Geography/Biosphere:  Unstable planetary climate typified by sulphurous rain storms, hurricane winds and specifically tornadoes in polar latitudes. Planetary surface designated as 'ash waste' with majority of population subsisting in dispersed communities throughout post-industrial 'sprawl' areas, with demographic concentrations found near higher-functioning industrial zones.
 * Governmental Type: Feudal Dictatorship, numerous rival Houses of Nobility. Power-base constituted on control of industrial areas and refining contracts.
 * Planetary Governor: None. Last incumbent, Duke Fultan Vualanti of House Vualanti, executed by the Fire Angels Chapter, no replacement appointed.
 * Adepta Presence: Minor; local Ministorum clergy, extant Administratum and Adeptus Arbites representation purged during Secession.
 * Military: As of 907.M41, former Planetary Defence Forces (PDF) made up on the combined armsmen cadres of Endymion's noble house (second line Imperial Guard equivalent) now in open revolt against the Imperium and principal forces engaged in heretical insurgency against Imperial rule.