Mundus Planus - Coming of the Emperor: Jaghatai's campaign of global conquest ended less than six solar months before the Emperor came to Chogoris in 865.M30 as part of His Great Crusade. Ironically, despite their role as pathfinders and discoverers, it was not a Pioneer Company of the Vth Legion that would discover lost Chogoris, but instead a fleet of the Luna Wolves Legion accompanied by both Horus and the Emperor.On that long-isolated world, Jaghatai had prospered, binding together the fractured tribes of the hinterlands to conquer empires and subjugate the entire world to his will. It was an achievement to rival any of those of his brother-Primarchs in their foundling years, and the Emperor hailed him as a true son and inheritor of the legacy He had prepared for him.The Great Khan, himself a builder of empires, was handed a destiny that saw him resigned to the role of servant and not master, bound to the ambitions of the Emperor. Such abasement did not come easily to such a conqueror as he, one who had slain kings and tyrants across the breadth of Chogoris, but still the Great Khan knelt before this Emperor.Most historical accounts, such as that of the noted Imperial historian Carpinus, who compiled a detailed history of the Great Crusade in the so-called Speculum Historiale, indicate that Jaghatai was overawed by the Emperor of Mankind and submitted without question to his ideal of unity, but his own journals and writings show a more pragmatic reasoning behind the submission. Jaghatai, who had struggled long with the disunity of his adopted people, saw clearly the benefits of the Imperium and the Emperor's secular doctrine of the Imperial Truth, and in the ranks of the Luna Wolves he saw the dire cost of opposition.It was the same choice he himself had once offered to the tribes and cities of Chogoris, and even when it was cloaked in pomp and ceremony, the Khan of Khans understood what the Emperor's offer meant: to live as His vassal or perish as His rival. So the Khagan bargained for his loyalty and that of those he ruled, taking from the Emperor those guarantees he deemed fair regarding the treatment of the people of Chogoris and of his role in the future empire.He would fight once again for unity and in secret revelled in the new challenge before him, at last able to slip the bonds of duty that had kept him busy with the mundane realities of governorship on Chogoris.Despite having already mastered the strategies of conquest in his own war against the petty empires of Chogoris, Jaghatai Khan was unfamiliar with the advanced weapons and war engines of the Imperium. With fighting across the galaxy reaching a fevered intensity, the forces of the Emperor could ill spare any Primarch for lengthy training in the etiquette of the Terran Court or the intricacies of Imperial history.All were needed upon the front lines as the expanding Imperium began to encounter more and more powerful xenos realms and fallen kingdoms of Mankind hidden in the dark void. The conquest of Chogoris was, in the eyes of the Emperor and many of the Primarchs, more than proof of Jaghatai's skill at war.Indeed, of all of his new brother Primarchs, only Roboute Guilliman and Rogal Dorn objected to the all too brief period of induction that Jaghatai received. Both felt that to leave the new Primarch bereft of a true understanding of the Imperium's foundation and culture would leave him ill-prepared to integrate properly with its factions and politics.Despite these objections, whose foresight was to prove unfortunate, the full authority of Legion Master of the Vth Legion was invested in Jaghatai, known among his brothers as "the Khan" and among his own warriors as the Khagan, the Khan of Khans.The Khan's Terran-born gene-sons adopted the practice of bearing the long facial scars of their Primarch's Talskar tribesmen that ran from forehead to chin to show that they were warriors, and renamed themselves the White Scars in honour of their Primarch's people.The Great Khan ascended to the heavens with the Emperor, passing the Khanship of Chogoris and the Talskar to his general Ogedei. Many of Jaghatai's followers elected to join their Khan and became Space Marines within the Vth Legion. The White Scars' Legionary culture soon came to be dominated by the beliefs and practices of the nomadic tribes of Chogoris.