Horus Heresy · atlas

Theme · 6 events

The geography of late arrivals

Who is not standing at the walls in 014 — and why that is canon, not a gap in coverage. Thramas, the Ruinstorm, Trisolian, Imperium Secundus, Caliban. The absence of a primarch is as much a fact of the map as his presence.

Events of the theme

  1. 007.M31 Deliverance Lost Pyrrhic loyalist victory

    After the slaughter on Isstvan V the surviving Raven Guard returned to Deliverance, and the Emperor presented Corax with primarch gene-technology for the rapid restoration of the Legion.

  2. 007.M31 Thramas Crusade Inconclusive

    After Isstvan V Horus sent Konrad Curze and the Night Lords to the Eastern Fringe — to bleed and pin down the Dark Angels so that the Lion would not come to Terra.

  3. 009.M31 Imperium Secundus Proclaimed Loyalist victory

    With the galaxy cleaved by the Ruinstorm and no word of the Emperor, Guilliman founded a second Imperium centred on Ultramar in order to preserve the Emperor’s legacy.

  4. 012.M31 Battle of Trisolian Pyrrhic loyalist victory

    In the Trisolian system the Space Wolves struck at Horus’s escort fleet of ~50 battleships, and Leman Russ wounded the Warmaster with the Spear of Russ aboard the “Vengeful Spirit” before the Wolves…

  5. 014.M31 Guilliman Arrives Too Late Loyalist victory

    While the traitors fell into panic, the arriving Ultramarines fleet incinerated their armada in orbit of Terra.

  6. 015.M31 Destruction of Caliban Pyrrhic loyalist victory

    Grief-stricken at the fate of the Emperor, mortally wounded and interred on the Golden Throne, Lion El’Jonson returned to Caliban — and his ships were met by a salvo of planetary guns: his old…

How to look in the atlas
  • Time slider at 14.4 – 14.6, the “Legions” rail → I, VI, XIII, XIX: their markers lie outside Sol — that is exactly what a “late arrival” looks like on the map.
  • Search: “Guilliman Arrives Too Late” (14.62) — the arrival comes AFTER the duel (14.593).
  • “Battle of Trisolian” (12.1): Russ wounds Horus and leaves in pursuit — after that the VI drops out of the equation of Terra.
  • “Destruction of Caliban” (15.3) already stands in the epilogue era — the Lion physically could not have been at the walls.

Show on the map

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Disputed in the canon

  • Caliban in 015.M31 (disputed): The sources disagree (right after the Heresy / 009–014 in the novels about the Fallen). The atlas keeps 015.M31; see the dispute “The destruction of Caliban relative to the Siege”.
  • The year of Caliban’s destruction is disputed: old summaries give only “immediately after the Heresy”, the novels about the Fallen scatter the event across 009–014.M31, and the Lexicanum infobox places it in the Great Scouring, ~015.M31. The atlas holds 015.M31 so that the Lion’s absence from the walls in 014 reads as a fact of his route and not as a coincidence of the hour. See the dispute “The destruction of Caliban relative to the Siege”.
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