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Horus Heresy Timeline
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A Timeline of the Horus Heresy.
- Note: Not all events of the Heresy can yet be categorized
- Note: Some dates are approximate estimates based upon the chronological events of the series itself
Year | Event | Notes | |
792.M30 | Perturabo estimates this as the date of his own creation.[18] | Possible date for the creation of the Primarch's | |
840.M30 | Magnus the Red is discovered by the Emperor.[19] | ||
964.M30 | The Emperor and Ultramarines destroy Monarchia[1] | Lorgar begins his Pilgrimage | |
965.M30 | ALL DATA REDACTED[1] | Incident involved the Space Wolves | |
966.M30 | Cadia enters the Imperium[1] | Lorgar completes his conversion to Chaos | |
969.M30 | ALL DATA REDACTED[1] | Incident involved the Space Wolves | |
970.M30 | The Zaramund Campaign[17] | Lion El'Jonson effectively exiles Luther and many of his Dark Angels to Caliban, fostering the seeds of resentment that will eventually give birth to The Fallen. | |
981.M30 | Alpharius Omegon assumes control of the XXth Legion[1] | The last Primarch is discovered by the Emperor | |
984.M30 | Konrad Curze destroys his homeworld of Nostramo[1] | ||
994.M30 | The Isstvan System is brought into compliance by the Raven Guard[1] | ||
000.M31 | The Ullanor Crusade[1] | Horus is named Warmaster after the victory and the Emperor returns to Terra for his secret project | |
000.M31 | The Cleansing of Laeran. Fulgrim discovers the Silver Blade of Laer[3] | Beginning of Fulgrim's descent into madness | |
000.M31 | The Chondax Campaign begins[1] | ||
001.M31 | The Council of Nikaea[1] | The Emperor bans the use of Librarians among the Legiones Astartes | |
001.M31 | With the aid of John Grammaticus, Alpharius Omegon is shown a prophetic vision by the Cabal that convinces them to betray the Emperor and side with Horus in the coming rebellion in order to save Humanity.[7] | ||
002.M31 | Erebus steals the Anathame from the Interex[2] | Beginning of the Word Bearers plan to initiate an uprising against the Emperor. The weapon will be used to convert Horus to Chaos | |
003.M31 | The Imperium loses contact with the Isstvan System[1] | ||
003.M31 | The Luna Wolves are renamed the Sons of Horus[1] | ||
004.M31 | The Battle of Davin's Moon.[1] Horus falls to Eugen Temba armed with the Anathame. He is resurrected by the Serpent Lodge and secretly pledges to overthrow the Emperor. Magnus' attempt to warn his father of the treachery create a catastrophic psychic backlash on Terra, causing the Emperor to dispatch Leman Russ to Prospero | Events orchestrated by Erebus, beginning of the War Within the Webway on Terra that will leave the Emperor indisposed for the rest of the Heresy. | |
004.M31 | Horus kills Fabricator Consul Emory Salignac of the Auretian Technocracy, triggering a ten-month war with the Technocracy.[8] | The war was orchestrated by Horus to obtain STC's in order to secure an alliance with Kelbor-Hal. After securing Mechanicum support, Lorgar sets them to secretly construct three Furious Abyss Battleships | |
004.M31 | Perturabo destroys Olympia after a rebellion[1] | ||
004.M31 | Horus works secretly to convert Fulgrim, Mortarion, Angron, Konrad Curze, Perturabo, and Alpharius to his cause. Those he judges too loyal are dispatched on campaigns far from Terra.[16] | ||
005.M31 | The Blood Angels disappear en-route to Signus Prime[1] | ||
005.M31 | The Dark Angels are dispatched to the Eastern Fringes by Horus[1] | Ploy by Horus to move his potential enemies away from Terra | |
734004.M31 | The Burning of Prospero.[1] Magnus is broken by Leman Russ and teleports the survivors of the Thousand Sons to the Planet of the Sorcerers | ||
005.M31 | The Battle of Isstvan III. Horus declares open rebellion against the Emperor. The Sons of Horus, Emperor's Children, World Eaters, and Death Guard purge loyalist elements of their Legion's.[1] | End of the Great Crusade, beginning of the Horus Heresy | |
005.M31 | The Flight of the Eisenstein. Nathaniel Garro of the Death Guard leads a force of loyalist survivors from Isstvan III through the Warp towards Terra to warn of Horus' treachery[13] | ||
005.M31 | The Eisenstein arrives at Luna. The Battle of the Somnus Citadel. Terra learns of the rebellion by Horus[13] | Malcador the Sigilite forms the Knights-Errant in the aftermath, led by Garro | |
005.M31 | The Schism of Mars begins[1] | War will continue for the next year | |
005.M31 | The Battle of Diamat. Lion El'Jonson and the Dark Angels battle traitor forces and encounter Perturabo who is on his way to Isstvan V. However the Dark Angels Primarch is unaware of his secret allegiance to Horus and the two part ways.[15] | Meanwhile on Caliban, Luther begins defying the Lion and forms the first of The Fallen | |
006.M31 | The Drop Site Massacre.[1] The Word Bearers, Alpha Legion, Night Lords, and Iron Warriors reveal their treachery and take part in the annihilation of the Raven Guard, Salamanders, and Iron Hands. Ferrus Manus is killed and Fulgrim becomes possessed by a Daemon. Vulkan is taken prisoner by Konrad Curze. Corax begins a guerrilla war against traitor forces for the next several weeks before being rescued. | Shortly after the battle, Magnus sends word to Horus of his interest in an alliance. | |
006.M31 | The Battle of Signus Prime.[3] Sanguinius proves himself incorruptible[4] | The Red Thirst manifests on a large open scale among the Blood Angels for the first time | |
006.M31 | The First Battle of Paramar[4] | ||
006.M31 | Iron Warriors loyal to the Emperor defend the Schadenhold from their traitor brethren in a siege lasting a year and a day, Terran standard.[11] | ||
006.M31 | Mars falls to the Dark Mechanicum[4] and is subsequently blockaded by the Imperium | ||
006.M31 | The Battle of Beta-Garmon's first, smaller phase begins | Civil war between the Mechanicum | |
200007.M31 | Corax arrives in the Sol System and receives new gene technologies from the Emperor to create new enhanced warriors[5] | Omegon begins plans to steal the new technology | |
007.M31 | The Battle of the Phall System[4] | ||
007.M31 | The Battle of the Perfect Fortress | ||
007.M31 | The Battle of Ravendelve[5] | Corax halts the production of his enhanced warriors, the Alpha Legion secretly acquires the technology | |
007-009.M31 | The Battle of the Coronid Deeps and Manachean War[4] | ||
007.M31 | The Battle of Calth.[4] The Word Bearers reveal their treachery to the Ultramarines. | The Ruinstorm forms in the aftermath, cutting off Ultramar from the greater Imperium | |
007.M31 | A strike force of loyalist Astartes destroys the Word Bearers ship Furious Abyss before it can attack Macragge[12] | ||
007.M31 | The First Siege of Hydra Cordatus | ||
007.M31 | Perturabo and Fulgrim journey to the Eye of Terror to find the Angel Exterminatus, where the latter betrays the former to transform himself into a Daemonic entity[6] | ||
007.M31 | The Shadow Crusade begins with the Battle of Armatura[4] | Massacres are designed by Lorgar to feed the growing Ruinstorm | |
007.M31 | The Thramas Crusade begins[4] as the Night Lords begin a genocidal rampage across the Eastern Fringe to bog down the Dark Angels | ||
007.M31 | Nathaniel Garro, Tylos Rubio, and Macer Varren return to Isstvan III and discover that former Luna Wolves Captain Garviel Loken is alive[14] | Loken mentally rehabilitated and inducted into the Knights-Errant | |
~007.M31 | The Tenebrae Mission | Omegon seemingly sabotages the Traitor effort to keep the White Scars from knowing about the Heresy | |
007.M31 | The Battle of the Alaxxes Nebula[4], the Space Wolves are devastated by a Alpha Legion ambush but ultimately manage to escape | ||
007.M31 | The Chondax Campaign ends[4] as the White Scars break through a Alpha Legion blockade and head towards Prospero | ||
007.M31 | The Second Battle of Prospero, the White Scars and Death Guard clash | The last Primarch of unknown allegiance, Jaghatai Khan, declares himself for the Emperor. Four years of hit-and-run war against the traitors by the White Scars begins | |
008.M31 | The Ruin of Maedran | One of the largest Titan battles of the war | |
~008.M31 | The Raven Guard undertakes guerrilla and special operations that liberate the worlds of Scarato, Constanix II, and Carandiru | ||
~008.M31 | The Battle of Perditus. Lion El'Jonson and the Dark Angels defeat a Death Guard force under Calas Typhon and acquire an alien device that allows them to conduct far more efficient Warp travels | ||
008-013.M31 | The Underground War begins in the aftermath of the Battle of Calth[4] | ||
008.M31 | The Mezoan Campaign[4] | ||
008.M31 | Traitor forces conquer Manachea[4] | ||
008.M31 | The Shadow Crusade ends.[4] Angron is transformed into a Daemonic entity | ||
008.M31 | The Fall of Baztel III | ||
008.M31 | The Dark Brotherhood appears in the Pale Stars | First major appearance of Blackshields | |
008.M31 | The Battle of Bodt | ||
008,M31 | The burning of Ohmn-Mat | ||
008.M31 | The Isessos Genocide | ||
008.M31 | The Officio Assassinorum fails to assassinate Horus on Dagonet | ||
008-009.M31 | The Battle of Vannaheim | ||
008.M31 | The Battle of Dwell | ||
008.M31 | The Battle of Molech[4] | Horus seemingly gains the powers of the Emperor | |
009.M31 | The Thramas Crusade ends[4] with the Night Lords scattering following an ambush by the Dark Angels | Konrad Curze begins hiding within Lion El'Jonson's flagship Invincible Reason | |
009.M31 | The Xana Incursion | ||
009.M31 | The Defense of Coronis Agathon[4] | ||
009-053.M31 | The Carnage of Morox | ||
009.M31 | The Battle of Arissak | ||
009.M31 | The Sangraal Campaign | ||
009.M31 | Fearing Terra lost, Roboute Guilliman declares Imperium Secundus[4] | Using the Pharos, loyalist ships lost in the Warp due to the Ruinstorm will find their way to Macragge | |
009.M31 | Lion El'Jonson and a contingent of Dark Angels arrive in Imperium Secundus. Konrad Curze escapes the Invincible Reason and rampages across Macragge. An insane Vulkan is recovered by the loyalists.[9] | Sanguinius arrives at Macragge shortly after and is declared Regent of Imperium Secundus | |
009.M31 | The Battle of Sotha | ||
010-013.M31 | The Cataclysm of Iron | ||
010.M31 | The Solar War begins | ||
010.M31 | The Scouring of Gilden's Star | ||
010.M31 | The Battle of Nyrcon | ||
010.M31 | The Battle of Nocturne[10] | Vulkan is restored shortly after | |
010-012.M31 | The Battle of Tallarn[4] | ||
~010.M31 | The Battle of Pluto | Alpharius seemingly dies in battle against Rogal Dorn | |
~011.M31 | The Battle of the Kalium Gate and Battle of Catallus | Jaghatai Khan and the White Scars return to Terra | |
~011.M31 | Following proof that the Emperor lives, Imperium Secundus is abolished by Roboute Guilliman, Sanguinius, and Lion El'Jonson. The Blood Angels, Ultramarines, and Dark Angels leave Ultramar and attempt to reach Terra through the Ruinstorm. However ultimately only Sanguinius and the Blood Angels will make it. Guilliman will lead another slower advance towards Terra. | Journey includes the Battle of Anuari, Battle of Pyrrhan, and Second Battle of Davin | |
???.M31 | Shadrak Meduson is captured and executed by Tybalt Marr following the Battle of the Aragna Chain | ||
~011-013.M31 | At Lion El'Jonson's orders, the Dark Angels begin a campaign of Exterminatus against the traitor homeworlds | Barbarus and Chemos are destroyed | |
011-014.M31 | The Malagant Conflict | ||
011.M31 | The Battle of Zepath | While not found on Zepath, Konrad Curze is eventually captured on Macragge and forced to stand trial | |
011.M31 | The Nostramo Sector is destroyed by an unknown enemy | ||
011.M31 | The Tarren Suppression sees loyalist forces retake the world of Tarren IV | Traitor forces retake planet shortly after | |
012.M31 | The Battle of Trisolian | Leman Russ and Horus one another in a duel aboard the Vengeful Spirit. | |
012.M31 | The Battle of Yarant | Leman Russ is rescued by Corax | |
012.M31 | The Battle of Tralsak | ||
012.M31 | The Council of Terra declares a new Adeptus Mechanicus made up fully of loyalist elements. Distinct from the traitor-aligned Mechanicum of Mars under Kelbor-Hal, loyalist Fabricator-General Kane gains a seat on the Council.[21] | Mass executions of Martian-aligned Tech-Priests take place following the decision.[21] | |
012.M31 | The Balthor Sigma Intervention | ||
012.M31 | The Scouring of the Ollanz Cluster | ||
012.M31 | The Battle of Beta-Garmon's 2nd and larger phase with the arrival of Horus' armada | One of the largest battles of the Heresy | |
~013.M31 | Horus falls into a coma following Beta-Garmon, but orders the mustering of the traitor primarch's to Ullanor in preparation for the drive on Terra.[20] | Horus eventually recovers, Lorgar retrieves Fulgrim from the Eye of Terror while Perturabo retrieves Angron on Deluge. Lorgar is exiled after attempting to usurp the Warmaster.[20] | |
~013.M31 | Following the purging of Ynyx, Calas Typhon sabotages the Death Guard Navigators in the Warp which allows them to succumb to Nurgle[22] | Then the Death Guard arrive at the Siege of Terra, they have been fully corrupted by Chaos | |
~013.M31 | Malcador presents his nine chosen Knights-Errant to the Emperor who are subsequently sent to Titan | Will go on to found the Grey Knights | |
013.M31 | The Battle for Honourum | ||
013.M31 | The Battle of Thagria | Lion El'Jonson and the Dark Angels aid loyalist Mechanicus forges in the civil war on Thagria after arriving there for repairs | |
~014.M31 | The Battle of the Carchera System | The Iron Warriors try to delay the Ultramarines advance to Terra | |
0000014.M31 | The final phase of the Solar War | Horus' armada captures the Sol System before moving on Terra | |
014.M31 | Traitor forces reach the Imperial Capital, beginning the Siege of Terra.[4] After killing Sanguinius, Horus is slain in the final battle with the Emperor. The Traitor Legion's retreat, effectively securing Loyalist victory in the Horus Heresy. However, Malcador the Sigillite is dead and the Emperor is now permanently interred upon the Golden Throne. | The Great Scouring begins in the aftermath of the Traitor defeat. Traitor forces begin their retreat to the Eye of Terror |
Sources
- 1: The Horus Heresy Book Two - Massacre pg.19
- 2: Horus Rising (Novel) Chapter 7
- 3: Fulgrim (Novel)
- 4: Horus Heresy Weekender Presentation 2016
- 5: Deliverance Lost (Novel) Chapter 5
- 6: Angel Exterminatus (Novel) Chapter 23
- 7: Legion (Novel) Chapter 10
- 8: False Gods (Novel) Chapter 19
- 9: The Unremembered Empire (Novel)
- 10: Deathfire (Novel)
- 11: Age of Darkness: The Iron Within
- 12: Battle for the Abyss (Novel)
- 13: Flight of the Eisenstein (Novel)
- 14: Garro: Legion of One
- 15: Fallen Angels (Novel)
- 16: Galaxy in Flames (Novel)
- 17: Angels of Caliban (Novel) - Prologue
- 18: Perturabo: The Hammer of Olympia (Novel) Chapter 7
- 19: Magnus the Red: Master of Prospero (Novel) Chapter 2
- 20: Slaves to Darkness (Novel)
- 21: Adeptus Titanicus (2018) Rulebook pg.18
- 22: The Buried Dagger (Novel)