Roboute Guilliman - Ultramar Campaign: In the closing years of the 41st Millennium, the stellar realm of Ultramar came under sustained attack from myriad foes. Menacing shapes stirred in the intergalactic void, the Tyranids of Hive Fleet Leviathan drifting inexorably towards Guilliman's realm.The Arch-Arsonist of Charadon, one of the greatest Ork Warlords in the galaxy, led a monstrous WAAAGH! from his anarchic domain with the intent of overrunning the Ultramarines' eastern defences. Yet the greatest threat of them all was that posed by the dark servants of Chaos.A vast horde of Traitors, Renegades, mutants and madmen fell upon Ultramar under the leadership of the foul Daemon Prince M'kar the Reborn. That invasion plunged dozens of worlds into bloody battle, war raging from the worlds of Espandor and Tarentus to oceanic Talassar. Yet eventually, after long solar months of sorrow, bloodshed and loss, the Ultramarines prevailed. M'kar was defeated and his armies driven off, pursued to the stellar void beyond the bounds of Ultramar.So began a period of rebuilding and consolidation across Ultramar, as Marneus Calgar and his Chapter led their peoples' efforts to shore up the battered defences of their realm. It was a period of repose and recovery that was to be all too swiftly ended.In the days immediately after the fall of Cadia at the climax of the 13th Black Crusade, Abaddon the Despoiler, Lord of the Black Legion, was informed by the Chaos Sorcerer Zaraphiston of a disturbing reality. The sorcerer had discovered through his Warp-scryings that the Archmagos Dominus Belisarius Cawl had escaped Cadia's destruction with a device in his possession that could turn the tide of the Long War in favour of the Imperium of Man.The Despoiler also learned that Cawl was one of a number of survivors of Cadia, now calling themselves the Celestinian Crusade, who had escaped into the Webway with the aid of the Aeldari Ynnari and were making their way to Macragge, the homeworld of the Ultramarines Chapter.To neutralise the nascent threat to his coming triumph over the Corpse-Emperor, the Despoiler detached a portion of his Black Fleet and ordered a Chaos Space Marine invasion of the Realm of Ultramar as part of the 13th Black Crusade.So it was that Abaddon was able to muster a sizable force of warriors from the Black Legion, the Iron Warriors, the Night Lords and a number of other Traitor factions, and hurl them against the worlds of Ultramar.While some Heretic Astartes warbands struck at the outer star systems in an effort to tie up potential Loyalist reinforcements, the main Traitor horde rode the tempestuous currents of the Warp straight into the Macragge System itself. So began another desperate and bloody invasion of the Ultramarines' realm remembered as the Ultramar Campaign of the 13th Black Crusade.The Celestinian Crusade, named for Saint Celestine, the Living Saint who had come to aid the defenders of Cadia in their darkest hour, was led not only by its namesake but also by Archmagos Cawl, Marshal Marius Amalrich of the Black Templars, and Inquisitor Katarinya Greyfax of the Ordo Hereticus. These individuals, joined by the Ynnari's commanders Yvraine, the Daughter of Shades, and her war leader The Visarch, first stepped from the Webway and onto the soil of the Shrine World of Laphis in the Macragge System.They were surprised to discover that they had set foot in a war zone, but they soon defeated the local Chaos forces that had been in the vicinity of the Webway portal. The Celestinians and their uneasy Aeldari allies defeated the Heldrakes besieging the local Ultramarines fortress and then convinced the Space Marines to grant them passage to Macragge, though Yvraine and the Visarch sent the majority of the Ynnari back into the Webway to carry out missions more pressing for their people.The Celestinians arrived at Macragge aboard an Ultramarines Strike Cruiser to discover that the capital world of Ultramar had come under a full-scale invasion by the forces of Chaos. While a massive battle raged in orbit between the Chaos and Loyalist fleets, on the ground the Fortress of Hera, the Ultramarines' fortress-monastery, was in danger of falling to the Archenemy.Gaining an audience with Marneus Calgar, the Chapter Master of the Ultramarines and the Lord of Macragge, Belisarius Cawl revealed that he was over 10,000 standard years old and had known the Ultramarines' Primarch Roboute Guilliman during the time of the Horus Heresy.Cawl explained that he had been tasked by Guilliman with finding a way to restore the primarch to life even before his mortal wounding by the Daemon Primarch Fulgrim in the time after the Heresy. Within the auto-reliquary he had kept with him since before coming to Cadia, Cawl maintained a unique suit of Artificer Armour, the Armour of Fate, that could sustain the primarch's life functions, and the Emperor's Sword, a weapon in which was embedded a small portion of the Emperor's own psychic essence.Though Calgar and his Chapter Council were wary of the Celestinians, especially because they had openly allied themselves with xenos, Chief Librarian Tigurius supported their story. He explained to Calgar that he had been having prophetic dreams and the arrival of the Celestinians was no coincidence.In fact, it might be the Ultramarines' only hope in the face of the Chaos onslaught. Calgar accepted this explanation, and allowed the Celestinians and the Ynnari into the Temple of Correction where Guilliman sat in stasis despite his reservations about the newcomers.While Cawl began his work on the time-frozen body of Guilliman, seated upon his throne in the temple, the Black Legion took notice of the activity and launched a massive assault upon the Temple of Corrections, fearful of what the Loyalists were attempting.The Celestinians, aided by the Ultramarines' officers and the 3rd Brotherhood of the Grey Knights led by Grand Master Aldrik Voldus who had come to Macragge to aid the defence, faced off against over a hundred Black Legionaries.Yet, even as the Loyalists fought to give Cawl just one more solar second to complete his work, more Chaos forces poured into the shrine from above using Dreadclaw assault boats, and the defenders quickly found themselves overwhelmed.Only then, at the last, did Yvraine call upon the power of her patron, Ynnead, the partially awakened Aeldari god of the dead. The alien god's power over life and death combined with Cawl's arcane technology to heal the primarch's wound and awaken him from his ten-thousand-year slumber.An awakened and enraged primarch proved more than the Chaos attackers were prepared to deal with. Guilliman shattered the attacking forces of Chaos and provided an extraordinary surge in morale for his Ultramarines and the other Loyalist forces.The Imperials quickly swept the Black Legion before them, breaking the back of the Chaos assault upon the Ultramarines fortress-monastery. In that one moment of resurrection, the fate of Macragge and of all Ultramar was decided.In the wake of the battle in the Temple of Correction, Guilliman was crowned as the restored primarch of the Ultramarines Chapter and all of its Successor Chapters, and as the Lord Macragge and rightful ruler of Ultramar. Marneus Calgar happily ceded the role of Chapter leadership to his gene-father, while Guilliman declared that the autonomy of all the worlds that had once belonged to the Realm of Ultramar and gone their separate ways in the millennia since the Horus Heresy was revoked.Ultramar was to be restored to what it had been in the golden age of the Imperium, a miniature stellar empire comprising five hundred human-settled worlds. Once in full control of the Loyalist forces on Macragge, the primarch's strategic genius was unleashed, and the forces of Chaos were driven off of Macragge and then from most of Ultramar within approximately seven solar months.At that time, Yvarine, the Visarch, and the remaining small force of Ynnari took their leave to pursue their own agenda, with the primarch's wary blessing -- and thanks.During this time, the primarch found himself suffering from a spiritual malaise, as he was forced to come to grips with the reality of the Imperium of Man in the late 41st Millennium. Far from the golden rule of prosperity, scientific wonder and freedom promised by the Emperor, the Imperium in His absence had degenerated into a despotic, tyrannical regime defined by ignorance, fear and superstition.At first despairing, Guilliman finally found hope for humanity's future once more deep in his heart and declared that he must make his way from Macragge through the roiling tides of the Warp to Terra. There he would consult with his father, the Emperor, and determine what must be done to save the Imperium from the servants of the Dark Gods.And so began the fateful Terran Crusade.