Horus Heresy · atlas

Section · 6 disputes

Disputes

Where the sources disagree: the positions, and what the atlas holds.

All entries

Disputes 6

  • The date of the Battle of Molech dispute resolved

    Dispute resolved: the atlas holds 009.M31. The atlas used to treat the year as disputed (009 or 010.M31), citing “some Black Library publications”; the check of 2026-10-18 found…

  • Who shielded the Emperor on the Vengeful Spirit 4 positions

    The atlas has the character Ollanius Persson; the Pius myth lives in the glossary and the canon notes rather than as a separate duplicate event. The retcon is neither struck out…

  • The death of Alpharius / Omegon 3 positions

    The event of the death and the character “Alpharius and Omegon” both remain in the atlas; where the canon is riddled with gaps, the side is marked “Traitor (disputed)”. The atlas…

  • The Imperium Secundus window 3 positions

    We hold the window 009.M31 → ~011.M31: the start is the Pharos and the proclamation of Secundus (+28 months from Calth, “Unremembered Empire”), the end is the dissolution and…

  • The destruction of Caliban relative to the Siege 3 positions

    015.M31 — after the Siege, so that the Lion’s absence from the walls in 014 reads as a fact of his route and not as “he is still on Caliban at that very hour”. It is more…

  • Legion strengths 3 positions

    The force snapshots are a reconstruction from the Black Books (Isstvan V — from Journal Tactica), without Titans and the Excertus. Orders of magnitude matter more than units: 250…