Uploading the first draft of their overall history:
The origin of the Imperial Sons is one of betrayal, retribution and idealism. Once a part of the XIIIthLegionesAstartes, the Ultramarines, they were known as one of the fiercest followers of the Imperial Truth, which was delivered by the Emperor himself. As part of the Xth chapter, the Legionnaires under ArceasOdinathus witnessed some of the hardest fights the Legion had to endure.
Before their gene-father, RobouteGuiliman was rediscovered on Macragge, the Xth chapter fought alongside the VIIIthLegionesAstartes, the Night Lords, for several times. From them, they learned how to use fear as a tool to bring entire wars to end. Though fear and intimidation were not the final means, they were useful in themselves. From destruction came rebuilding. From intimidation came trust. Those worlds, which were brought into compliance by Commander Diomes and his men, were glorious examples of the potency of mankind. From these worlds, the system sorrounding the world known as Corusca became their very masterpiece. Never did the Xth, also known as the Sons of the Imperium for outliving the tenets of the Imperial Truth, ever reform a world into such an efficient and prospering world. Coruscawas said to potentially become a prime world like Macragge, a bastion of hope and future expansions.
That all changed, when the first bombs fell on Calth. The dreadful betrayal of the XVIIIth Legion left its mark on the entirety of the sons of Guiliman. An invisible bond of shared horrors bound those, who survived the attrocities of Calth. Unfortunately, those, who were not present, like the Xth chapter, became outsiders within their own Legion. While their brothers bled in the dust of Heresy, Odinathus and his men fought in the northern realms of the SegmentumUltima against the Heldaxi alliance. After finally hearing of what happened to their brothers, Odinathus decided to turn his forces against the retreating elements of both, the Word Bearers and the World Eaters. Thus, the Sons of the Imperium dived into the unstable region known as the Dominion of Storms, chasing down their traitorous brothers. In doing so, they reconquered Honourum and fought within the Nostraman sector against the remnants of the Night Lords traitors.
In order to engage as much traitors as possible, Odinathus tasked his second in command, Galen Diomes, in plunging more into the Dominion, destroying every renegade force they would encounter, while he would be heading northbound. With half of the chapter under his direct control, Galen Diomes stayed within the Dominion, trying to eradicate the hiding traitors. Their main antagonist in this campaign became the Brotherhood of Kain, a confluence of both, the Word Bearers and the World Eaters.
While fighting their nemesis, the Sons of the Imperium were trapped within the Dominion alongside their enemies because of rising storms and unpassable nebulas. Years later, the tides lifted and the few survivors of Diomes’ task force returned to the Imperium. It is assumed that the Brotherhood of Kain was completely eradicated. However, rumors were recently arising, heralding the return of Kain’s followers.
In the meantime, the Second Founding was already done and the Third was drawing closer. Before they returned to Macraggedid Diomes traveled to the nearby Corusca in order to resupply and enact crucial maintenances. However, when they entered the orbit of Corusca, they found nothing more than ashes and madness. Corusca had fallen beneath the merciless advance of Horus’ forces, turning it into a pit of anarchy and chaos worshipping cults, corrupted beyond salvation.
Diomes had no other choice than to scorch the entire system, destroying everything they had once achieved. Blaming themselves for not being able to prevent Corusca’s demise and for not having prepared it against all odds, did they swore an eternal oath never let this happen again. From the ashes of Corusca did they arose anew as the Imperial Sons. It was they, who would bring the unquestionable truth of the Emperor to every world within the Imperium. The personal convictions and ideals of Diomes and his men were immingled with the tenets of the Imperium Truth and later with the Codex Astartes, forming the Corusca Doctrine.
When they returned to Macragge, they found out that all loyal Legions had been divided into several chapters. As their brothers of the Scyths of the Emperor chapter, were Diomes’ men reformed into an independent chapter, the Imperial Sons. As such, they returned to the northeastern corner of the Dominion of Storms, claiming a new homeworld for their own, naming it Bastion. Once a former base of operation of the Brotherhood of Kain, it was conquered and reformed into a proud and loyal fortress world, serving as both, a social center and training grounds for the Imperial Sons.
From Bastion did the Imperial Sons start their crusade of reclamation, slowly discovering the dangerous realm of the Dominion. While half of the chapter fought within the Dominion against rediscovered kingdoms of man and xenos alike, did the other half fought across the Imperium, serving in the name of the Imperial Truth and those, who had fallen in its name.
Edited by Kelborn, 02 May 2017 - 09:42 PM.