Roboute Guilliman — Primarch of the XIII Legion ' Ultramarines', Lord of the Five Hundred Worlds, now know as 'the Avenging Son M'kar dogged Persson's footsteps across several planets and time periods (appearing sporadically throughout human history, such as at the Siege of Verdun in 1916M2). I The Solar War • II The Lost and the Damned • III The First Wall • Sons of the Selenar • IV Saturnine • Fury of Magnus • V Mortis • VI Warhawk • VII Echoes of Eternity • Garro: Knight of Grey • VIII The End and the Death ( Volume I • Volume II • Volume III) Mark of Calth Audiobook https://ipaudio6.com/wp-content/uploads/K40K/1%20SER/HORUS%20HERESY/25%20Mark%20of%20Calth/01.mp3 As the magos concentrated on gaining access to Calth's planetary defence system, the Loyalists' fate took a turn for the worst. The forces of the XVII th Legion's Commander Hol Beloth descended upon the guildhall with a vengeance. He had come to punish the hated Ultramarines with a force of Traitor Titans, the Word Bearers' Terminator-armoured Cataphractii and the dreaded daemon-possessed Astartes of the Gal Vorbak.

Having secured the shipmaster and the senior Mechanicum magos, the Ultramarines Legion had won a very real hope of regaining control of the Macragge's Honour. It was not until both Gage's and Thiel's forces at last fought their way through what remained of the warp incursion and rendezvoused at the auxiliary bridge that either knew for certain that the other had succeeded in their mission. It was a tense wait for the first squads to arrive at the muster point, but it was soon apparent that both forces had achieved their equally vital objectives. Early in the rise of Roboute Guilliman, Calth became part of the new Ultramar empire. When Guilliman met the Emperor of Mankind, Calth became part of the greater Imperium. [10] Of the Word Bearers who landed on the surface of Calth, almost none would ever leave. It is estimated that 50,000 or more of Lorgar's sons and an uncounted mass of Renegade Auxilia troops were sacrificed in the battle, although only 20,000 are thought to have died in the initial fighting, with the remainder prosecuting the Underworld War on Calth for over a solar decade after the initial battle. The vile Word Bearer stepped forth beside the wounded Primarch and put the blade of the Athame to Guilliman’s throat. The Primarch grunted through clenched teeth as the foul blade bit. Kor Phaeron attempted to cajole Guilliman into giving up and joining the blessed cause of the Dark Gods against the False Emperor. Guilliman only muttered in reply. I Horus Rising • II False Gods • III Galaxy in Flames • IV The Flight of the Eisenstein • V Fulgrim • VI Descent of Angels • VII Legion • VIII Battle for the Abyss • IX Mechanicum • X Tales of Heresy • XI Fallen Angels • XII A Thousand Sons • XIII Nemesis • XIV The First Heretic • XV Prospero Burns • XVI Age of Darkness • XVII The Outcast Dead • XVIII Deliverance Lost • XIX Know No Fear • XX The Primarchs • XXI Fear to Tread • XXII Shadows of Treachery • XXIII Angel Exterminatus • XXIV Betrayer • XXV Mark of Calth • XXVI Vulkan Lives • XXVII The Unremembered Empire • XXVIII Scars • XXIX Vengeful Spirit • XXX The Damnation of Pythos • XXXI Legacies of Betrayal • XXXII Deathfire • XXXIII War Without End • XXXIV Pharos • XXXV Eye of Terra • XXXVI The Path of Heaven • XXXVII The Silent War • XXXVIII Angels of Caliban • XXXIX Praetorian of Dorn • XL Corax • XLI The Master of Mankind • XLII Garro • XLIII Shattered Legions • XLIV The Crimson King • XLV Tallarn • XLVI Ruinstorm • XLVII Old Earth • XLVIII The Burden of Loyalty • XLIX Wolfsbane • L Born of Flame • LI Slaves to Darkness • LII Heralds of the Siege • LIII Titandeath • LIV The Buried DaggerThe crux of the campaign came on the Agri-world of Calth in the Ultramar Sector, where the Ultramarines successfully broke the Word Bearers' surprise assault after a viciously-fought siege action, though at the cost of terrible casualties and the complete destruction of Calth's atmosphere and once-verdant biosphere. Remus Ventanus is one of the rarest of Space Marine heroes – a legend from the 31st Millennium whose name is still known 10,000 years later. High above Calth, in the master control room of the Zetsun Verid Fleet Yard, Roboute Guilliman confronted Kor Phaeron. Instead of fighting the Primarch in honourable combat, the Word Bearers' First Captain resorted to using the sorcerous abilities granted him by the Chaos Gods, slamming the Primarch of the XIII th Legion against the chamber wall with a column of wretched, living darkness that burst forth from the palm of his right hand. Xana Incursion • Carnage of Morox • Sangraal Campaign • Liberation of Numinal • Battle of Arissak • Battle of Perditus • Battle of Sotha • Scouring of Gilden's Star • Battle of Nyrcon • Battle of Tallarn • Battle of Nocturne • Battle of Pluto My brother, hear me. Warriors of the XVII th 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."

As the southern island cities were being pounded to dust and vapour, the battle in the void was spilling ever further across Calth Near-Space. The world was ringed by over nine hundred orbital defence platforms, each bristling with lance turrets, weapons Life on Colchis was often harsh outside of the cities which were all controlled by a religious institution known as The Covenant. Slavery was rife, and Desert nomads who dwelt outside of these cities were dubbed The Declined and seen as damned by the Great Powers. [4] History Comprising the majority of the XIII th Legion's Destroyer assets, and the stores of volatile and hazardous weaponry that characterised their operations. The 22 nd Chapter, known as the " Nemesis" Chapter, was often deployed in small formations alongside other chapter units. At Calth, 2,000 Nemesis Legionaries were mustered along the desolate Thrascias Highlands, furthest from the densely populated cities of Calth:

The arcology systems offered sufficient protection for the remaining inhabitants of Calth and their defenders to survive the wave of solar death that was about to engulf their world. This message successfully reached many millions of people who successfully took shelter within Calth's underground warrens, which had originally been built to free up more land for agricultural cultivation. The Heresy came to Calth without warning. In just a few hours of betrayal and bloodshed, the proud warriors of the XIIIth Legion – Guilliman’s own Ultramarines – were laid low by the treachery of their erstwhile brothers of the XVIIth. Now, as the planet is scoured by solar flares from the wounded Veridian star, the survivors must take the fight to the remaining Word Bearers and their foul allies, or face damnation in the gloomy arcology shelters beneath the planet’s surface. Of those who arrived under the banner of the Word Bearers, exact information is more difficult to discern, as many units arrived under false colours and forged identification signals. Based on the pict-recordings of surviving Ultramarines units and other sources, the following Word Bearers chapters are known to have been presnet, at least in part, during the Calth atrocity:

The Heresy came to Calth without warning. In just a few hours of betrayal and bloodshed, the proud warriors of the XIIIth Legion - Guilliman's own Ultramarines - were laid low by the treachery of their erstwhile brothers of the XVIIth. Now, as the planet is scoured by solar flares from the wounded Veridian star, the survivors must take the fight to the remaining Word Bearers and their foul allies, or face damnation in the gloomy arcology shelters beneath the planet's surface. In the novella-length 'Calth That Was', Graham McNeill highlights the fateful encounter that will alter the destiny of Captain Ventanus and shape the face of the Ultramarines Chapter for ten thousand years to come. The battle for Calth is far from over.

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The term Mark of Calth refers to two related phenomena occurring in the course of the Battle of Calth, during the Horus Heresy. It reduced Traitor Titans, armoured vehicles, Chaos Cult auxiliary and Word Bearers infantry formations to so much ash within only seconds. However, the weapon strike occurred less than half a kilometre from where the Loyalists had taken shelter from the coming impact. Roboute Guilliman: Lord of Ultramar • Leman Russ: The Great Wolf • Magnus the Red: Master of Prospero • Perturabo: The Hammer of Olympia • Lorgar: Bearer of the Word • Fulgrim: The Palatine Phoenix • Ferrus Manus: Gorgon of Medusa • Grandfather's Gift • Perturabo: Stone and Iron • Malcador: First Lord of the Imperium • Konrad Curze: A Lesson in Darkness • Jaghatai Khan: Warhawk of Chogoris • Vulkan: Lord of Drakes • Sons of the Emperor • Corax: Lord of Shadows • Angron: Slave of Nuceria • Scions of the Emperor • Konrad Curze: The Night Haunter • Ghost of Nuceria • The Passing of Angels • The Abyssal Edge • Mercy of the Dragon • Lion El'Jonson: Lord of the First • Illyrium • The Revelation of the Word • Morningstar • Will of the Legion • Embers of Extinction • Alpharius: Head of the Hydra • Blood of the Emperor • Loyal Sons • Mortarion: The Pale King • Rogal Dorn: The Emperor's Crusader • Sanguinius: The Great Angel • Heirs of The Emperor By the time Gage was able to see a nea Unusually, the book is written almost entirely in the present tense, purporting to be the official Imperial action report on the events of the battle, interlineated with the personal notes of Primarch Roboute Guilliman.