System Purge
Mars and the Mechanicum
The Schism of Mars, the blockade, loyalist enclaves, and the political consequences of the war among the machines.
24 works · one selected story line
connecting to the catalogue · 0
primary secondary placements always shown read
Short story2025
System Purge
Gav Thorpe
WebwayConnected books↗
Mars and the Mechanicumunbroken chronology · time runs left to right
827.M27600.M28400.M29200.M30000.M31005.M31date uncertaindate uncertaindate uncertainSiege: approximate campaign frame, 574–588.014.M31date uncertain
M27 / M28
M28 / M29
M29 / M30
M30 / M31
The Kiarii WarsFrom 827.M27; nearly three decades · 1
Mars before the SchismBefore the Schism of Mars; exact years and the boundary with the opening of the Heresy are uncertain · 1
The Martian civil warThe Schism of Mars in the early Heresy; Mechanicum’s main narrative — c. 005.M31 · 4
Blockade of MarsAfter the Schism of Mars; episodes during the blockade · 3
The Attack on the OmnissiaxAfter Isstvan V, approximately 006–007.M31 · 1
Cavor Sarta: the Kryptos RaidAfter Isstvan V, before Angel Exterminatus; exact date unknown · 1
The Battle for Felweather KeepThe Horus Heresy; exact year unknown · 1
Mars: the rebirth of House TaranisYears after the Schism of Mars; exact year unknown · 1
The Burning of Ohmn-Mat008.M31: the invasion force arrives · 1
The Defence of RyzaDuring the Horus Heresy; the exact year is not confirmed · 1
The Battle for Perditus Umbral 51The Lion’s expedition to Perditus, before the Thramas finale; exact year unconfirmed · 2
The Webway War and its aftermathApproximately 011.M31 to early 012.M31 · 1
The Incursion on XanaXana campaign · exact date not established · 1
The founding of the Adeptus Mechanicus012.M31 · a political consequence of the Martian Schism · 1
Terra: Preparations for the SiegeBefore the invasion of the Sol System; individual stories have different dates · 1
The Siege: The Solar WarDays 000–119.014.M31 · 1
Siege: the last stand at the Eternity GateSiege: approximate campaign frame, 574–588.014.M31 · 1
Lion’s Gate: the post-Siege purgeAfter Horus’s death, before the Ultramarines arrive; exact day unknown · 1
005.M31 · 4 at this point
date uncertain · 2 at this point
date uncertain · 2 at this point
Short storyUnmarkedThe Kaban ProjectGraham McNeillBefore the Schism of Mars, a prelude to Mechanicum; exact year unknownPlacement note
Short storyUnmarkedThe HarrowingRob SandersAfter Isstvan V, approximately 006–007.M31↗date approximate
NovellaUnmarkedThe LionGav ThorpeThe Lion’s expedition to Perditus, before the Thramas finale; exact year unconfirmed◎Placement note
Short storyUnmarkedBringer of SorrowAaron Dembski-BowdenAfter the Webway War, on Terra before the Siege; exact year unknown↗Placement note
Short storyUnmarkedThe NineJustin D. Hill014.M31, after the Mars blockade is broken; exact day unknownPlacement note
Short story2025
System Purge
Gav Thorpe
Anthologies and collections
Seriescontents, span and overall progress
wheel / pinch · zoom