Formidyre System - System Worlds: The Formidyre System is comprised of seven inhabited Imperial worlds, which orbit from nearest to farthest from the system's primary of Formidyre, a blue giant star, as listed below:Sanctum (White Templars Chapter planet) - During the Fourth Tyrannic War, the White Templars' own Chapter planet of Sanctum came under assault by Hive Fleet Grendyllus, a tendril of the larger Hive Fleet Leviathan. With the aid of Lord Commander Solar Arcadian Leontus and the forces of the Astra Militarum he commanded who were using Sanctum as base to face the Great Devourer in the galactic west, the White Templars were able to defeat the assault of the Tyranids even as it crashed against the walls of their fortress-monastery Holdfast. The White Templars' Chapter Master Kruxor Stavro served as the co-commander of the Imperial forces tasked with defending Holdfast. The other was Lord Solar Leontus, who acted as the heart and mind of the fortress-monastery's defence. Stavro served as the defence's blade-wielding fist and led each punishing counter-attack that drove the invading Tyranids back from Holdfast and ensured any breaches the xenos made in the fortress-monastery's walls were sealed. The Imperial Fists had also arrived in orbit of Sanctum in their great mobile fortress-monastery Phalanx to aid the defence of the White Templars homeworld along side a great battlefleet of the Navis Imperialis intended to hold the xenos enemy at bay for as long as possible.Dornwall (Asteroid Field) -  The Dornwall, named after Primarch Rogal Dorn who the White Templars once believed mistakenly to be their primarch, was located in orbit of Sanctum and served as the Chapter planet's first line of defence from void assault. It was defended by servitor-manned orbital gun-shrines and outer defence forts placed amid the orbital debris.Krematos (Mortuary World) - Krematos was a Mortuary World where large areas of the planet's surface were given over to care for the remains of the honoured Imperial dead. It was administered by the Ecclesiarchy just like Shrine Worlds.Resolution's Ire (Fortress World)Jovenghast (Feudal World)Phraktam (Industrial World)Lembyq (Laboratory World) - Lembyq served as a "Laboratory World", better known as a Research Station, under the control of the tech-priests of the Adeptus Mechanicus.Oghram (Dead World (Currently)/Hive World (Formerly)) - Oghram is the outermost planet of the Formidyre System. It was in a pivotal position in the path of the oncoming swarm -- its defiance could have become a legendary note of hope, like noble Macragge during the First Tyrannic War, or it could end as just the latest world stripped lifeless by the insatiable hunger of the Tyranids. Home to countless billions of Imperial citizens, this rich, bustling hub of biomass had caught the notice of the Tyranids, and soon suffered beneath a barrage of alien incursions. For vengeance, and to cleanse the world of xenos taint, the Adeptus Astartes launched a vicious counter-offensive. The fate of the world  came to rest on a knife-edge. In the first phase of the Tyranid assault, Tyranid spores rained down upon the planet's surface. The chittering hordes of aliens devoured all in their path -- the single-minded will of the Great Devourer made manifest. Even at this early stage, little hope remained for the survival of the world and its people. Yet despite the valiant defence of the Space Marines, their efforts came to nought, and the world ultimately fell to the Leviathan, its people and all of its remaining biomass consumed by the hive fleet until all that remained was barren, lifeless rock. Despite its status as a Hive World, Oghram was still inhabited before the destruction of its biosphere by some strains of Terran wildlife, including mammals like foxes, badgers and pumas, and bird species like the heron.