Changes

**[[12th Expedition Fleet]]<br><small>(Formerly)</small>

**[[Fleet Primus]]<br><small>(Era Indomitus)</small>

**[[Grand Council of Reconstruction]]

**[[High Lords of Terra]]

While the history books state Guilliman militarily subdued the Illyrians, the reality was more complicated. Rather than engage in a protracted mountain guerrilla war, he simply occupied the Illyrians sacred shrines. This caused the Illyrians to surge forth to meet his armies, but rather than crush them then and there he challenged their Chieftain to battle. During the duel, Guilliman only defended himself from his foes blows but never launched his own attacks. The Chieftain eventually exhausted himself, but rather than slay his enemy Guilliman instead presented him with the Illyrians most sacred religious artifact, which centuries before the Consuls of Macragge had stolen. Guilliman's act of diplomacy and humanity convinced the Illyrian Chieftain to halt his campaign, seeking to become a just lord like Guilliman instead. It was at this moment that Tarasha Euten realized Guilliman had proven himself a true King.{{Fn|23}}

[[File:Roboute Guilliman.jpg|thumb|200px|right|'''Roboute Guilliman''']]

Meanwhile [[Angron]] of the [[World Eaters]] and [[Lorgar]] of the [[Word Bearers]] had launched the [[Shadow Crusade]] on isolated worlds in Ultramar. Their plan was to destroy as much of Ultramar as they could while the Ultramarines were occupied on Calth.{{Fn|9}} After the victory at Calth, Guilliman, presumably under the guidance of his newly reinstated [[Librarians]], traveled to an isolated [[Warp]] jump point on the outer fringes of Ultramar. There he encountered [[Sanguinius]] of the [[Blood Angels]] who has just recently finished his war in the [[Signus]] cluster. The [[Navigators]] of the Blood Angels had been ordered to find the closest stable Warp zone, which many assumed would be [[Terra]]. Instead fate brought them to Ultramar. With the addition of the Blood Angels to his forces, Guilliman pronounced they could finally begin countering the Shadow Crusade.{{Fn|10}} After Calth, Guilliman pursued Lorgar, who had since allied with Angron, to the world of [[Nuceria]]. There, the Ultramarines engaged both the [[World Eaters]] and [[Word Bearers]] while Guilliman himself battled Lorgar, finding the once-weaker Word Bearers Primarch to be surprisingly capable in combat. The situation for Guilliman got worse when Angron arrived, battering Guilliman with a furious assault and eventually defeating the Lord of Macragge.{{Fn|11a}} However as Angron was about to land the final blow, Ultramarines were able to arrive and safely retrieve their Primarch.{{Fn|11b}}

However Guilliman frequently clashed with his distrustful and taciturn brother Lion El'Jonson over policy. Obsessed with hunting for Konrad Curze on Macragge, the Lion insisted that the Night Haunter was behind rebellions plaguing the world and demanded martial law be instituted. After a suicide bombing hit an Astartes convoy on Macragge, the Dark Angels were deployed by the Lion to establish martial law without Guilliman's express permission. Guilliman and the Lion again came to disagreement over the rebellion in the Illyrium region of Macragge, with the Dark Angels primarch wishing to use weapons of mass destruction to flush them out as he suspected Curze was hiding there. Ultimately the Lion led the attack into Illyrium, and Curze was captured. At Guilliman's insistence, he was given a public trial. During the trial, Curze accused the Lion of ordering secret orbital attacks against the rebellion which enraged the Dark Angels Primarch and nearly led to him slaying Curze in the court. Guilliman and Sanguinius dismissed the Lion from Imperium Secundus as response, but later the Lion reappeared and asked to be Curze's jailer instead.{{Fn|16}}

Ultimately, Guilliman was able to set course for Holy [[Terra]]. Travelling at maximum speed, his reinforcement fleet of over 3,200 capital ships was scant hours away as The Emperor battled Horus aboard the ''[[Vengeful Spirit]]''. However without the [[Astronomican]] to light the way, Guilliman's force was marooned just out of Terra's reach as at conventional speed it would take tens of thousands of years for them to eventually find the Throneworld.{{Fn|26a}} This situation reversed when, thanks to the effort of [[Euphrati Keeler]] and her faithful, the Astronomican was reactivated{{Fn|26b}} and Guilliman arrived at Terra to drive back the traitors in the wake of Horus' defeat.{{Fn|4}}

===Post-Heresy===

Guilliman led the assault against the [[Alpha Legion]] on [[Eskrador]] in the aftermath of the Heresy, and due to the vanity of [[Alpharius]], he utilised a surprise attack at the heart of the traitors and killed Alpharius in a duel. However, he and his sons were greatly mistaken in their belief that the snake would die without the head, as indeed, the Alpha Legion's symbol is a hydra, a multi-headed serpent. The Ultramarines were soundly pushed back time and again by the traitor marines, undaunted at the loss of their Primarch. Guilliman eventually pulled his forces back into orbit and bombarded the planet from above.{{Fn|3}}

Afterwards, Guilliman landed on Terra and gained access to the Emperor's Throne room inside the [[Imperial Palace]]. Guilliman stood before the [[Golden Throne]] alongside [[Captain-General]] [[Trajann Valoris]], and the Emperor awoke for the first time in millennia. In a surreal experience which Guilliman can not fully remember, the now nearly inhuman Emperor told him that he was the last hope to save Mankind and brutally assaulted his mind with dark truths of the galaxy and its history. What exactly transpired is unclear. According to Valoris, Guilliman spoke in silent psychic conversation with the Emperor for several minutes, while Guilliman remembers falling to the ground in agony. Moreover, only minutes seemed to pass for the two, but when they emerged it had been over a day.{{Fn|25b}}

Guilliman subsequently declared the [[Indomitus Crusade]] to reclaim the [[Imperium Nihilus|devastated worlds]] isolated from Terra by the [[Great Rift]]. The campaign was waged for the next several years, as Guilliman acted as supreme commander and chief administrator of the Imperium. He simultaneously oversaw vast campaigns spearheaded by [[Belisarius Cawl]]'s new [[Primaris Space Marines]] and sweeping civic reforms which culminated in the [[Codex Imperialis]].{{Fn|18}}

It soon became apparent that the Necrons intended to capture, not destroy, the Imperials in hopes of perhaps gaining Guilliman. Ordering the evacuation of his flagship ''[[Dawn of Fire (Battleship)|Dawn of Fire]]'', Guilliman stayed on board with a force of [[Custodes]] under [[Colquan]] to draw the Necron's attention.{{Fn|31c}} The ''Dawn of Fire'' was quickly disabled by the Necrons, who boarded the vessel with troops as Guilliman and his entourage finally began an attempt to withdraw. [[Cato Sicarius]], commander of the [[Victrix Guard]], was able to destroy a [[Necron Lord]] to clear a path for Guilliman to flee as a gateway opened, revealing the Silent King Szarekh personally. Guilliman drew the [[Emperor's Sword]] and prepared for a fight, but was foiled by [[Illiyanne Natasé]], who closed the portal and allowed the group to escape as the ''Dawn of Fire'' was destroyed.{{Fn|31d}} In the aftermath of the battle, with Cawl having largely achieved his mission to locally disrupt the [[Pariah Nexus]], Guilliman left the Nephilim warzone and appointed [[White Consuls]] [[Space Marine Captain|Captain]] [[Vitrian Messinius]] as its warden.{{Fn|31e}}

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|align="center"|'''''Let them bestride the galaxy like the gods of old, sheltering Mankind from destruction at the hands of an uncaring universe.'''<br> - from the teachings of Guilliman, as laid down in the Apocrypha of Skaros, on the [[Space Marines]]''

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|align="center"|'''''It is the great irony of the Legiones Astartes: engineered to kill to achieve a victory of peace that they can then be no part of.'''<br> - shortly before the [[Battle of Calth]]''

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|align="center"|'''''Space Marines excel at warfare because they were designed to excel at everything. Each of you will become a leader, a ruler, the master of your world and, because there is no more fighting to be done, you will bend your transhuman talents to governance and culture.'''<br> - shortly before the [[Battle of Calth]]''

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|align="center"|''''''''Never wish for danger. Danger needs no help. There is no such thing as fate that can be tempted, but morale is never improved by an active lust for war.<br> - Remark 56.xxi''

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|align="center"|'''''Two things to note there, [[Aeonid Thiel|Sergeant]]. One is that there is no such thing as a minor detail. Information is victory. One cannot and should not dismiss any data until one is in a position to evaluate its significance, and that only comes with hindsight. So all detail is important until circumstances render it redundant.

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|align="center"|'''''[[Lorgar|My brother]], hear me. Warriors of the [[XVII Legion]], hear me. This violence is against the code of the Legiones Astartes and against the will of our father, the Emperor. In the name of the Five Hundred Worlds of Ultramar, I implore you to cease fire and stand down. Open communication with me. Let us speak. Let us settle this. This action is an error of the most tragic kind. Cease fire. I, Roboute Guilliman, give you my solemn pledge that we will deal with each other frankly and fairly if these hostilities can be suspended. I urge you to respond.'''<br> - vox transmission, [[Battle of Calth]], Mark 0.00.01''

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|align="center"|'''''[[Lorgar]] of [[Colchis]]. You may consider the following. One: I entirely withdraw my previous offer of solemn ceasefire. It is cancelled, and will not be made again, to you or to any other of your [[Word Bearers|motherless bastards]]. Two: you are no longer any brother of mine. I will find you, I will kill you, and I will hurl your toxic corpse into hell's mouth.'''<br> - vox transmission, [[Battle of Calth]], Mark 1.57.42''

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|align="center"|'''''[[Wikipedia:Friedrich Nietzsche|What does not kill me... is not trying hard enough.]]'''''