Timeline of the Warhammer 40,000 Galaxy

The Dark Age of Technology was the era, from roughly M15 to M25, in which humanity reached its zenith of scientific and technological power, its reach centred…

The Age of Strife, also called Old Night, is the dark age that followed the collapse of the Dark Age of Technology.

The Battle at the Eternity Gate was fought upon Terra during the Horus Heresy, in which Sanguinius defended the Imperial Palace against Horus.

The Battle of Sixty-Three Nineteen was an engagement fought by the 63rd Expedition against a world that styled itself Terra and crowned its own Emperor.

The Beta Garmon Titandeath was a campaign of Titan warfare fought in the Beta-Garmon system during the Horus Heresy, delaying the Warmaster’s advance on Terra.

The Compliance of Murder was a Great Crusade action fought by the 63rd Expedition against the megarachnid infesting the world thereafter known as Murder.

The Council of Nikaea was a formal debate convened by the Emperor of Mankind to settle the Space Marine Legions’ use of psychic power.

The Defence of Mezoa was a major engagement of the Horus Heresy, fought to hold the forge world of Mezoa against besieging Traitor forces.

Monarchia was the capital of Khur, razed by the Ultramarines on the Emperor’s order for the Word Bearers’ veneration of him as a god.

The Discovery of Corvus Corax is the event linked to Deliverance, the moon formerly called Lycaeus, where Corax led a slave revolt and liberated the world.

The Discovery of Konrad Curze is the event associated with Nostramo, the sunless hive world that Curze later ruled.

The fall of the Eternity Wall spaceport was a major reverse suffered by the Loyalist defenders of Terra during the Battle for the First Wall in the Siege…

The Flight of the Eisenstein was the escape of the frigate Eisenstein from Isstvan III, bearing warning of Warmaster Horus’s treachery toward Terra.

The Great Crusade (late M30–M31) was the Imperium’s galaxy-wide reunification campaign, led from Terra by the Emperor and the primarch-led Space Marine Legions.

The discovery of Horus on Cthonia was the finding of Horus on a mined-out gang world near Terra.

Horus, Warmaster of the Imperium, led an Imperial expedition to Molech to seize the power of its warp gate, an act that precipitated his fall to Chaos.

The Iron Cage denotes the imprisonment and public display of captured Imperial Fists by the Iron Warriors during the opening battles of the Horus Heresy.

Jaghatai unifies Chogoris is the event in which Jaghatai Khan united Chogoris, the steppe world also recorded as Mundus Planus.

The Mournival was a four-officer counsel convened by Warmaster Horus aboard his flagship, the Vengeful Spirit, to advise him informally during the Horus Heresy.

Night of the Wolf is the name given in Fenrisian saga-tradition to a volatile encounter between the primarchs Leman Russ and Angron during the Great Crusade.

The Paramar Wars were a series of clashes fought across the Paramar system during the Horus Heresy between Traitor and Loyalist forces.

The Raven Guard reconstitution was the rebuilding of the shattered Legion on Deliverance after the Drop Site Massacre on Isstvan V.

The Remembrancer Order deployment placed Imperial remembrancers aboard the flagship Vengeful Spirit to chronicle the Great Crusade in prose, art, and record.

The Stand at Yarant was a large-scale battle of the Horus Heresy in which Space Wolves forces resisted a traitor assault on the Yarant system.

The Unification Wars, or Solar conquest, were the campaign that brought the Sol System under the rule of the future Emperor of Mankind in the 30th millennium.

The War in the Webway was a clandestine conflict waged by the Emperor of Mankind within the webway beneath the Imperial Palace on Terra during the Horus Heresy.

Warrior Lodges were clandestine fraternal societies that arose within several Legions during the Horus Heresy, inspired by tribal lodges on Davin.

Abaddon destroyed the Canticle City, the fortress on the daemon world of Harmony, by dropping the cruiser Tlaloc onto it from orbit.

The Battle of Calth was the Word Bearers’ ambush of the Ultramarines at Calth, opening the Horus Heresy’s Shadow Crusade in 007.M31.

The Battle of Lion’s Gate spaceport was a major engagement of the Siege of Terra between Sons of Horus assault forces and Imperial Fists defenders.

The Battle of Phall was an engagement between the Imperial Fists and the Iron Warriors, fought in the void at Phall in 007.M31.

The Battle of Prospero was the Space Wolves-led assault that razed Tizca and broke the Thousand Sons Legion during the early Horus Heresy.

The Battle of Tallarn was a campaign of the Horus Heresy fought on the Imperial world of Tallarn against the Iron Warriors Traitor Legion.

The Black Crusades are the thirteen great offensives launched by the forces of Chaos against the Imperium of Man from the Eye of Terror.

The Burning of Prospero was Leman Russ’s destruction of Tizca and near-annihilation of the Thousand Sons Legion on Magnus the Red’s homeworld.

The Council of Nicaea was a conclave convened by Malcador the Sigillite, acting upon the Emperor’s authority.

Death Guard claim Eliathada is an event in the Warhammer 40,000 timeline associated with the Plague Planet, Mortarion’s daemon home in the Eye.

The Death of Horus was the climactic duel of the Horus Heresy, fought aboard the battle-barge Vengeful Spirit in orbit above Terra.

The Defence of Ryza in the Horus Heresy concerns the forge world Ryza, which bore the cost of its rank as second among forge worlds during that conflict.

The destruction of Davin during the Ruinstorm was the attack on the feral world by Sanguinius, Guilliman and the Lion using cyclonic torpedoes.

The destruction of Nostramo was the bombardment by which Konrad Curze, primarch of the Night Lords, reduced his own homeworld to fragments.

The Doom of Valhalla was the impact of an iron comet that displaced the planet Valhalla from its orbit and froze its oceans.

The Exterminatus of Isstvan III was the attack in which four Legions used virus bombs against their own loyalists, revealing Horus’s rebellion.

The founding of the Grey Knights was the raising of a full Chapter within the Citadel of Titan, Saturn’s largest moon, during the Horus Heresy.

The Horus Heresy (005–014.M31) was a galaxy-spanning civil war led by Warmaster Horus Lupercal against the Emperor of Mankind.

Imperium Secundus was a short-lived second Imperial state proclaimed at Macragge during the Horus Heresy, formed after Ultramar lost all contact with Terra.

The Isstvan III Atrocity was the virus-bombing of loyalist Space Marines on Isstvan III, opening Horus Lupercal’s rebellion against the Emperor.

The Isstvan V Dropsite Massacre was a battle of the Horus Heresy fought in the Urgall Depression on Isstvan V in 006.M31.

The Legion Wars were internecine conflicts fought among the Traitor Legions within the Eye of Terror in the decades following the Horus Heresy.

Luther’s betrayal, or the Fall of Caliban, was the civil war in which Luther’s garrison turned Caliban against Lion El’Jonson, destroying the planet.

Malcador’s Warp sanctuary was the removal of Titan, Saturn’s largest moon, into the Warp by Malcador the Sigillite during the Horus Heresy.

The Night Lords assault on Nocturne was an attack by Konrad Curze’s Night Lords on the Nocturne system during the Horus Heresy.

The Night Lords exile seat after Nostramo was the court of Konrad Curze on Tsagualsa, the Carrion World, a quarry planet on the Eastern Fringe.

The Razing of Monarchia was the Emperor’s destruction of the Word Bearers’ monument-city on Cyrene, sister world to Colchis, during the Great Crusade.

Russ’s departure on the Great Hunt was the occasion on which Leman Russ left the Fang on Fenris for his last Great Hunt.

The Shadow Crusade was a Horus Heresy campaign waged in 007–008.M31 by the Word Bearers and World Eaters Legions against Ultramar.

The Shadow Crusade on Nuceria was the return of Angron and Lorgar to Nuceria during the Horus Heresy, in which they laid waste to the planet.

The Siege of Terra was the ground assault on the Imperial Palace that formed the climactic final battle of the Horus Heresy, fought in 014.M31.

The Signus Campaign, also called the Battle of Signus Prime, was a Blood Angels action in the Signus Cluster in 006.M31, during the Horus Heresy.

The Solar War was fought across the Sol System in 014.M31, as Horus Lupercal’s Traitor fleets drove toward Terra in the Horus Heresy’s final campaign.

The Corruption of Horus refers to events said to have taken place within the medicae and warp-touched chambers of the Vengeful Spirit following the Warmaster’s…

The Reproving of Monarchia was the Emperor’s chastisement of Lorgar and the Word Bearers Legion, marked by the razing of Monarchia in circa 005.M31.

The Rubric of Ahriman was a sorcerous working cast by Ahzek Ahriman that transformed most Thousand Sons warriors into inert, dust-filled suits of armour.

The Thramas Crusade on Tsagualsa was the contest for the Night Lords’ quarry planet on the Eastern Fringe, in which Lion El’Jonson fought Konrad Curze.

The Ullanor Crusade was a Great Crusade campaign fought to destroy a vast Ork empire massed in the Ullanor sector.

The Wounding of Horus was the near-fatal stabbing of Warmaster Horus in the Serpent Lodge temple on Davin’s moon.

The Battle of the Fang was the Thousand Sons’ assault on Fenris, homeworld of the Space Wolves, led by the daemon primarch Magnus the Red.

The War of the Beast was an Ork invasion of the late thirty-second millennium that erupted from the Ullanor sector and reached to the edge of the Sol System.

The Martyrdom of Saint Sabbat marks the death of the warrior-prophet Sabbat Beati on Harkalon, at the close of her crusade in the 35th millennium.

Saint Sabbat’s crusade from Hagia was the original campaign of Saint Sabbat, begun in the hills of Hagia in the thirty-fifth millennium (M35).

The Age of Apostasy is the Imperial era, centred on Terra, defined by the tyranny of Ecclesiarch Goge Vandire and the civil strife it provoked.

Aurelia, capital of the Aurelian subsector, was taken by a warp storm that froze its cities and removed it from realspace for centuries.

The Krieg civil war and reconquest was the conflict that followed the secession of Krieg’s autocrats in 433.M40.

The Siege of the Hagia Shrinehold was an assault by Infardi cultists and allied Chaos-aligned forces upon the shrine districts of Hagia.

The Battle of the Agripinaa System, fought during the 13th Black Crusade, was a Chaos assault on the Cadian Gate forge world of Agripinaa.

The 13th Black Crusade was Abaddon the Despoiler’s offensive against the Cadian Gate, and the Fall of Cadia was its culminating event.

The Aexe Cardinal trench war was a protracted campaign of attritional trench fighting waged on the world of Aexe Cardinal during the early 41st millennium.

Arks of Omen designates the Imperium-wide campaign fought after the Imperial Fists’ fortress-monastery, the Rock, was gravely damaged and cast adrift.

The Armour of Contempt campaign saw Imperial forces liberate Gereon from Archenemy occupation during the Sabbat Worlds Crusade.

The Assault on Black Reach was a campaign in which the Ultramarines confronted an Ork Waaagh!

The Assault on Formal Prime was the Guard offensive in which Warmaster Slaydo personally took Formal Prime during Operation Redrake.

The Assault on Nero Hive was an Imperial Guard and Raven Guard attack on the Chaos-held Nero Hive on Caligula during the Sabbat Worlds Crusade.

The Auto-seance Necroteuch inquiry was an investigation by Eisenhorn and Commodus Voke into Necroteuch fragments, hosted at Gudrun.

The Badab War was a decade-long secessionist conflict fought between 901 and 912.M41 in the Maelstrom Zone, precipitated by the Astral Claws Space Marine.

The battle barge sacrifice that ended Acheron was Gabriel Angelos’s crashing of a battle barge into a fissure, which broke the planet apart.

The Battle for Macragge relief fleet denotes the participation of Battlefleet Bakka, the Segmentum Tempestus naval force, in actions fought for Macragge.

The Battle of Helsreach was the defence of the hive city of Helsreach, Armageddon, against an Ork invasion during the Third War for Armageddon.

The Battle of Macragge was the concluding engagement of the First Tyrannic War, fought in 745.M41 at Macragge, capital of Ultramar.

The Battle of Sparshad Mons was the engagement between Imperial forces and the Blood Pact for the step-city of Sparshad Mons on Ancreon Sextus.

Beta Bequin’s Pariah awakening was the breaking open of her blank identity in the hive Queen Mab, prompted by Cognitae schooling and the Maze Undue’s collapse.

Quixos, a radical, bound the daemon Cherubael on Clanar II, a world that had worshipped it as a god for generations.

The Blood Pact is an elite corps of human warriors of the Archenemy, bound by a ritual blood oath to the warlord Urlock Gaur.

The Blood Pact Mabbon defection describes the surrender of the Blood Pact officer Mabbon Etogaur amid the Culzean war of the 41st millennium.

The Blood Pact offensive denotes the sustained campaigns waged by the Blood Pact across the Sabbat Worlds on behalf of the Anarch Urlock Gaur.

The Blood Ravens campaign on Tartarus was a war for the Maledictum relic, fought by Gabriel Angelos on an Imperial world in the Corribra Sector.

The Bonner’s Reach rendezvous was a meeting between Gideon Ravenor’s warband and the vessel Lucky Space, set at Bonner’s Reach in the 41st millennium.

The Burning of Tanith denotes the annihilation of the Imperial world by Chaos forces in the 41st millennium.

The City of Dust incursion was a forced entry into the City of Dust by Beta Bequin, Ravenor and Eisenhorn through Queen Mab’s gates.

The Clearing of the Gildar Rift was a campaign in which Silver Skulls companies hunted the Red Corsairs across the Rift’s inhabited worlds.

The closing of the regia occulta was the sealing by the young Eisenhorn of an occult gate on Ignix that had allowed Ork raiders to kill settlers.

The Cociaminus assault was a large-scale hive-city conflict fought on Cociaminus during the 41st millennium.

The Culzean contract war was a conflict on Gudrun between Orfeo Culzean’s hired operatives and Ravenor’s warband.

The daemon invasion after the Great Rift was an attack by daemons on Ryza, a forge world in Segmentum Ultima, east of Terra.

The daemon occupation and Indomitus relief was the post-Rift period in which daemons held the cardinal world of Ophelia VII until relief forces broke it.

The Damocles Crusade was a military campaign that devastated the cities of Dal’yth, a First Sphere sept world of the empire.

The Death Guard invasion of Angelisar was an attack by Death Guard forces on the tropical second world of the Thracian Primaris System.

The Death of Quixos was the killing of Quixos on Farness Beta in the mid-41st millennium by an Inquisitorial cell that included Gregor Eisenhorn.

Eisenhorn’s cell killed Quixos on Farness Beta before the radical’s copied pylons could pinch the Eye of Terror shut.

Warmaster Slaydo, commander of the Sabbat Worlds Crusade, died at Balhaut shortly after his forces’ victory there, precipitating a contested succession.

Cruor Vult, a Chaos Warlord Titan, was destroyed on Miquol by Eisenhorn after Fayde Thuring awakened it on Durer’s polar island.

The destruction of the Necroteuch at KCX-1288 was the burning of the tome by Eisenhorn during a confrontation in a collapsing system.

The Devastation of Baal was Hive Fleet Leviathan’s assault on Baal, homeworld of the Blood Angels, in the late 41st Millennium.

Alizebeth Bequin founded the Distaff, a school, on Messina before Pontius Glaw’s hirelings burned its premises.

The Distaff massacre was the destruction of Eisenhorn’s Distaff headquarters on Messina by Vessorine Janissaries in the pay of Pontius Glaw.

The Double Eagle air war was a large-scale aerial conflict fought over Phantine, in the Enothis system, during the Sabbat Worlds Crusade.

The Dysjunction of Commorragh was the rupture of Khaine’s Gate that caused civil war in the Dark City.

Eisenhorn and Magos Geard Bure destroyed the Lith-cult in the mines of Cinchare when the rock began to alter the excavation.

Eisenhorn’s pursuit of Beldame Sadia on Lethe Eleven took place during Darknight, a fortnight-long eclipse of the star by the moon Kux.

Eisenhorn versus House Glaw was a confrontation that turned the noble estates of Gudrun into a war zone before the capital was transferred.

Eisenhorn’s Helican confrontation with House Glaw turned Gudrun’s noble estates into a war zone.

The Eisenhorn–Ravenor Helican Inquisition theatre comprises the successive Inquisitorial operations of Eisenhorn and, later, Ravenor in Helican.

Eisenhorn’s Eechan investigation was a covert inquiry into the flesh-trade in Eechan’s mutant carnival districts, linked to a Quixos pipeline.

The emergency dictatorship of Argon Prime was military rule that developed from a state of emergency its Astra Militarum general staff never rescinded.

The Enothis campaign was a large-scale armoured and aerial conflict fought on Enothis during the 41st millennium.

The Exterminatus of Cyrene was the destruction of Cyrene, a Blood Ravens recruiting world in Subsector Aurelia, after Gabriel Angelos halted its Blood Trials.

The Exterminatus of Typhon Primaris was the destruction of a Blood Ravens jungle world in Subsector Aurelia by the Ordo Malleus using cyclonic torpedoes.

The Eyclone Massacre refers to the killing of those interred or stationed within the Hubris Cryotombs, attributed to the renegade Inquisitor Tuomas Eyclone.

Eyclone’s cryotomb massacre was Murdin Eyclone’s killing of Dormant sleepers in the cryotombs of Hubris in an attempt to resurrect Pontius Glaw.

The Fall of Belshiir Binary was the capture of the industrial world of that name in 771.M41 by Urlock Gaur’s Blood Pact and loxatl mercenaries.

The Fall of House Glaw was the exposure and suppression of a Chaos cult centred on the Glaw noble house of Gudrun in the mid-41st millennium.

The fall of House Glaw, owing to its Chaos cult, cost Gudrun the Helican capital desk, which passed to Thracian Primaris.

House Glaw’s fall cost Gudrun the Helican capital and handed the desk to Thracian Primaris.

The Fall of Marax was the loss of Imperial rule on the death world of Marax, which passed to Chaos after centuries of heretical wars and daemonic incursions.

The Fall of Onscard was the swift capture of Onscard by Lord Militant Dravere in 755.M41, during Operation Redrake.

The Farsight expedition to Arthas-Moloch was a T’au mission to a dead artefact world on the Eastern Fringe that recovered the Dawn Blade.

The First Aurelian Crusade on Calderis was the opening phase of the First Aurelian Crusade, fought on the desert world of Calderis in Subsector Aurelia.

The First Aurelian Crusade on Meridian was a Blood Ravens campaign on the hive world Meridian in Subsector Aurelia, part of the Aurelian Crusades.

The First War for Armageddon, also called Angron’s First War, was a large-scale campaign fought on the hive world of Armageddon in Segmentum Solar.

The Flect epidemic on Eustis Majoris was the spread of flect, an addictive warp-tainted glass that produced visions, through the planet’s hives.

The flect trade war was a criminal conflict on Eustis Majoris fought between rival underworld factions for control of the flect trade.

The Fortis Binary action was a large-scale engagement fought by the Tanith First-and-Only on the forge world of Fortis Binary during the Sabbat Worlds Crusade.

Gathering Storm is a three-part campaign chronicling the fall of Cadia and the opening of the Great Rift late in the 41st millennium.

The Gershom Cognitae plot was a Cognitae conspiracy on Gershom, uncovered by the Magos investigations of Valentin Drusher.

The Guns of Tanith campaign was an Imperial Guard aerial assault to liberate Phantine during the Sabbat Worlds Crusade of the late 41st millennium.

The Hagia campaign of the Sabbat Worlds Crusade was the struggle for the shrine world of Hagia, birthplace of Saint Sabbat, during the later crusade.

The Hagia shrine war was a large-scale conflict fought in the 41st millennium on Hagia, a shrine world sacred to the cult of Saint Sabbat.

The Halo Scar expedition losses are the recurrent disappearances of Imperial expeditions sent into the Halo Stars and the Halo Scar.

The Helican capital transfer moved sub-sector authority from Gudrun to Thracian Primaris in 241.M41.

The Helican Schism was a division of authority in Scarus Sector after the fall of House Glaw and the capital’s move from Gudrun to Thracian Primaris.

His Last Command reformation denotes the reconstitution of the Tanith First-and-Only under Colonel-Commissar Ibram Gaunt during the Sabbat Worlds Crusade.

Hive Fleet Behemoth was the first tyranid splinter fleet encountered by the Imperium, its assault on Ultramar in 997–999.M41 culminating at Macragge.

Hive Fleet Leviathan is a Tyranid hive fleet whose late-41st-Millennium arrival opened the Third Tyrannic War, the largest tyranid incursion then recorded.

The House Glaw Inquisitorial purge was an Inquisitorial action, led by Commodus Voke, against House Glaw on Gudrun.

The House Glaw Saruthi excavation was an operation on Damask in which House Glaw enslaved Helican settlers to dig eight-sided tiles for a Necroteuch trade.

The Indomitus Crusade was a galaxy-spanning Imperial relief campaign launched from Terra by Roboute Guilliman in 999.M41.

The Invasion of Graia (Orks and Chaos) refers to the devastation of the yards of Graia by Ork and Chaos forces in the forty-first millennium.

The Jago fortress war was a protracted siege fought around an ancient Imperial stronghold on the fortress world of Jago during the Sabbat Worlds Crusade.

Kauyon, the Patient Hunter, is the T’au Empire’s doctrine of ambush and patience, paired with the swift strike of its counterpart, Mont’ka.

The King in Yellow naming denotes the episode in which the identity of the enigmatic King in Yellow was confirmed within the City of Dust.

The Liberation of Ashek II was an Imperial campaign in 756–757.M41 in which Marshal Blackwood’s forces broke Heritor Asphodel’s hold on the planet’s hives.

The Liberation of Long Halent was the capture of Long Halent in 755.M41 by Lord Militant Dravere’s battlegroup, at the opening of Operation Redrake.

The Liberation of the Menazoid Clasp was the recapture of a group of Sabbat Worlds from Chaos during Warmaster Macaroth’s crusade.

The Liberation of Verghast marks the relief of Vervunhive during the Sabbat Worlds Crusade of the late 41st millennium.

The Macharian Crusade was an Imperial campaign led by Lord Solar Macharius into the eastern frontier of Segmentum Pacificus in the late 41st millennium.

The Maginor confrontation averted was an Inquisitorial plan to assault Quixos’s mountain stronghold on Maginor that was not carried out there.

The Maledictum was shattered on Tartarus when Gabriel Angelos of the Blood Ravens destroyed the buried relic during the campaign for the world.

The Manifestation of Slyte was the appearance of the daemon Slyte on Eustis Majoris through Carl Thonius.

The Menazoid Epsilon operation was a Sabbat Worlds Crusade engagement fought on the world of Menazoid Epsilon during the 41st millennium.

The mindwipe regimen at Balthar’s Eye was an Inquisition-mandated programme of routine memory erasure for crews observing a Warp protrusion from the station.

The Molotch Enuncia excavation was Zygmunt Molotch’s dig on Zenta Malhyde, which gave rise to the Ravenor hunt, a pursuit never fully concluded.

Mont’ka, meaning the Killing Blow, is one of the two great battle doctrines of Tau’va warfare, the martial philosophy of the T’au Empire.

The Monthax engagement was an early large-scale battle of the Sabbat Worlds Crusade, fought in dense jungle terrain on the world of Monthax.

The Morlond strike was a large-scale engagement of the Sabbat Worlds Crusade fought for control of Morlond.

The Nephilim War is the protracted Indomitus-era struggle for the Nephilim system, contested by Aeldari corsairs, Drukhari raiders and Imperial forces.

The Octarius War is a protracted, unresolved conflict between an Ork empire and Tyranid forces for control of Octarius, a world in the Nachmund Gauntlet.

Only in Death Jago denotes the siege of the fortress Hinzerhaus, fought by the Tanith First-and-Only during the Sabbat Worlds Crusade.

The Opening of the Great Rift refers to the emergence, around 999.M41, of the Cicatrix Maledictum, a galaxy-spanning warp rift dividing the Imperium.

Lord Osma arrested the radical Eisenhorn as Extremis Diabolus once Ordo Malleus pressure had reached his documentary record.

The Phantine air war was a campaign of the Sabbat Worlds Crusade, fought in the toxic upper atmosphere of the hive world Phantine.

Playing Patience is the event at Eustis Majoris in which Patience Kys entered Ravenor’s warband while retaining the alias under which she fought.

The Post-Rift Chaos assaults on Gudrun were attacks by Chaos forces on the feudal world of Gudrun in the Thracian Primaris system.

Psychic Awakening is a twelve-part campaign series recording the galaxy-wide fallout from the Great Rift’s opening late in the 41st millennium.

The Purge of Maze Undue was an Inquisition operation against the Cognitae’s academy for blanks in Queen Mab.

The Reappearance of the Martyr was the 999.M41 return of the Fortress-Monastery battlecruiser Martyr to the Caligari Sector after millennia in the Immaterium.

The Reclamation of the Balthar System was the Imperial recovery of the system by Caligari Conclave and Inquisition missions after centuries of isolation.

The Recovery of the Pontius was Eisenhorn’s seizure of a crystal holding the encoded mind of the heretic Pontius Glaw on Damask.

The Return of Guilliman to Terra was Guilliman’s arrival on the Imperial capital after the fall of Cadia, undertaken to reopen the Indomitus war.

The Rise of Warmaster Macaroth marks Macaroth’s succession to supreme command of the Sabbat Worlds Crusade after Slaydo’s death.

The Sabbat Worlds Crusade was an Imperial campaign begun in 755.M41 to reclaim the Sabbat Worlds sector from the forces of Chaos.

The Salvation’s Reach raid was a covert strike conducted by the Tanith First-and-Only against an Archenemy stronghold during the Sabbat Worlds Crusade.

The Sameter veteran murders were a series of killings in Urbitane on Sameter in 241.M41, investigated by Inquisitor Gregor Eisenhorn.

The Second War for Armageddon was fought in 941–943.M41 on the hive world of Armageddon against an Ork Waaagh led by Ghazghkull.

The rivalry between the Chaos commanders Anakwanar Sek and Urlock Gaur divided the enemy war effort during the Sabbat Worlds Crusade.

The Siege of Badab Primaris was the final action of the Badab War, in which loyalist forces took the Astral Claws’ capital world.

Barban Falk brought a Grand Company back to Hydra Cordatus for Imperial Fists gene-seed and the apotheosis he had bargained for since the crone world.

The Siege of the Fenris System is a conflict in which Magnus’s Thousand Sons attack the Space Wolves’ home world of Fenris.

The Siege of Vervunhive was a protracted Chaos assault upon Verghast’s principal hive city during the Sabbat Worlds Crusade.

The Speranza expedition was Magos Kotov’s voyage into the Halo Stars in search of lost Mechanicus glory.

The Strange Demise of Titus Endor is the death of Inquisitor Titus Endor, which ended a Helican friendship on which Eisenhorn had long relied.

The Wars for Armageddon are a series of large-scale campaigns fought on the hive world of Armageddon in Segmentum Solar.

The Third War for Armageddon was an Imperial campaign fought on Armageddon from 998.M41 against the Goff Warboss Ghazghkull Thraka.

The Thirteenth Black Crusade on Belial IV is an event associated with Belial IV, a Crone World in the Eye of Terror.

Thorn Wishes Talon is an event marking the Helican contact of Eisenhorn and Ravenor, then master and pupil on the same Scarus board.

The Thracian Atrocity was an attack by Chaos-tainted pilots on Lord Helican’s Triumph, a parade held on Thracian Primaris.

Traitor General Gereon denotes the Chaos occupation of the Imperial world of Gereon and the covert hunt for the collaborator general concealed there.

The Tyranid Invasion denotes the recurring incursions of the Tyranids into the galaxy, first identified at Tyran in 745.M41.

Eisenhorn hunted the Urbitane veteran murders on Sameter when ritual corpses looked like Chaos work and were not.

The Urdesh campaign was a protracted Imperial Guard struggle to secure the forge world of Urdesh from the forces of Anarch Sek.

The Vanishings of Fornax Aleph were the disappearance of the hive populations in 757.M41 and of General Jater Elbeth’s force in 758.M41.

Waaagh!

The warpsurge isolation of Balthar was the centuries-long severance of the Balthar System from the Imperium by a violent warpsurge.

The Wars for Cociaminus were Imperial and Chaos campaigns for the planet Cociaminus, which changed hands repeatedly between 760 and 773.M41.

The Invasion of the Stygius Sector, also called the Stygius war, was an attack by Chaos on the hive world of Mordian.

The Plague Wars were a Death Guard invasion of Ultramar in the late 41st millennium, led by the Primarch Mortarion against Roboute Guilliman’s realm.

The Rift siege of Rynn’s World was a Daemon assault on the Crimson Fists’ home world, broken by the Indomitus Crusade under Roboute Guilliman.