Illyrium
The Ultramarines and Guilliman
A continuing route for the XIII Legion and Guilliman: the Great Crusade, Calth, the road to Terra and the post-Heresy legacy. Reforging includes Debt of Blood, the frame dispute with Diocletian, Dark Imperium’s opening Thessala chapters and The Aegidan Oath on Sotha. Only the early Thessala episode belongs here; the complete Dark Imperium remains in its modern Indomitus series. Secundus retains its separate political arc, and repeated appearances share one book and reading mark.
37 works · one selected story line
connecting to the catalogue · 0
primary secondary placements always shown read
Audio drama2019
Illyrium
Darius Hinks
WebwayConnected books↗
The Ultramarines and Guillimanunbroken chronology · time runs left to right
date uncertainAfter 810.M30, before 837.M30850.M30950.M30000.M31date uncertaindate uncertaindate uncertaindate uncertaindate uncertaindate uncertaindate uncertaindate uncertaindate uncertaindate uncertain
≈157 years compressed
M30 / M31
M31 / M32
The Unification of TerraThe Unification Wars; separate episodes · 1
Guilliman: Youth on MacraggeSeparate episodes from Guilliman’s youth on Macragge; no shared exact calendar interval is established · 1
The Thoas CampaignAfter Monarchia, before the Heresy; exact year unknown · 1
The Pursuit of the Furious AbyssLaunch of the Furious Abyss → pursuit → repairs at Bacca Triumveron → final battle at Macragge; exact interval not established · 1
The Diplomatic Mission to BastionAfter Isstvan V; the mission’s exact date is unknown · 1
Before the Battle of CalthBefore the Battle of Calth; exact episode dates are unknown · 2
The Long Underground War on CalthAfter the Battle of Calth · campaign approximately 007–014.M31 · 4
The Battle for CalthThe attack on Calth and its immediate aftermath, around 007.M31 · 7
The Battle for ArmaturaAfter Calth, before the return to Nuceria; exact date unestablished · 1
The Percepton Primus OperationMain attack around 290.008 — the world falls at 454.008.M31 · 1
Imperium SecundusAfter the founding of Secundus · before its dissolution · 5
Trials of the Codex AstartesTrials of the Codex Astartes after the Heresy began; exact date unknown, the wars depicted are training scenarios · 1
Sotha and the PharosLate 010–011.M31: preludes, battle and aftermath · 2
The Ruinstorm and the aftermath of SecundusLate Heresy after the fall of Secundus · episodes across several years · 2
Stories across erasSeveral eras; no single date · 1
Charchera: Guilliman’s fleet delayedAfter Ruinstorm, on the way to Terra; approximately late 012 to early 013.M31 · 1
The Nightfane conspiracy: the Bael operationAfter Red-Marked and the end of the open war for Ultramar; exact year not confirmed · 1
The Second Founding: birth of the Flesh TearersThe Second Founding and the Chapter’s early years; around 021.M31 · 1
Diocletian after the HeresyAfter the Siege: the dispute with Guilliman and a much later visit to the Throne · 1
Thessala: Guilliman’s woundingThessala · conventionally 121.M31 · 1
The Third Founding and the oath on SothaAlmost a thousand years after the Heresy, around the start of M32 · 1
date uncertain · 2 at this point
date uncertain · 2 at this point
date uncertain · 2 at this point
date uncertain · 2 at this point
date uncertain · 2 at this point
Garro: Malcador’s MissionsAfter the Eisenstein returns; several missions, no single date · 1
Audio dramaUnmarkedHubris of MonarchiaAndy SmillieImmediately before the gathering on Calthdate approximate
NovellaUnmarkedCalth That WasGraham McNeillAlmost immediately after Know No Fear; the beginning of the Underground War↗date approximate
NovellaUnmarkedThe UnburdenedDavid AnnandaleAfter the attack on Calth, around 007.M31: parallel sides of the underground war↗Placement note
NovellaUnmarkedThe HonouredRob SandersAfter the attack on Calth, around 007.M31: parallel sides of the underground war↗Placement note
Audio dramaUnmarkedGarro: Oath of MomentJames SwallowMission on Calth several days after the attack begins◎Placement note
NovelUnmarkedBetrayerAaron Dembski-BowdenAfter Calth, before the return to Nuceria; exact date unestablished◎Placement note
Short storyUnmarkedA Deeper DarknessRob SandersWithin the Underworld War, 007–014.M31; exact year unknown↗date approximate
Short storyUnmarkedThe Laurel of DefianceGuy HaleyCeremony in Secundus · around 010.M31; exact date unknown↗date approximate
Short storyUnmarkedRules of EngagementGraham McNeillLive exercises testing the Codex; after the Heresy began, exact date unknown◎date approximate
Audio dramaUnmarkedRed-MarkedNick KymeOran · after Calth, in the established Secundus; approximately 010–011.M31date approximate
NovelUnmarkedAngels of CalibanGav ThorpeSecundus crisis · around 011.M31; after Pharos◎Placement note
Short storyUnmarkedThe Atonement of FireDavid AnnandaleImmediately after Ruinstorm · late 011 to early 012.M31 (approximate)date approximate
Audio drama2019
Illyrium
Darius Hinks
NovellaUnmarkedSpear of UltramarDavid AnnandaleAfter Ruinstorm, on the way to Terra; approximately late 012 to early 013.M31date approximate
Audio dramaUnmarkedNightfaneNick KymeProbably 013.M31 according to the audio dramas' dates; after Red-Markeddate approximate
Short story / microfictionUnmarkedDebt of BloodAndy SmillieAround 021.M31; shortly after the Second Founding↗Placement note
NovelUnmarkedDark ImperiumGuy HaleyDark Imperium opening chapters: Thessala, conventionally 121.M31◎date approximate
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