Horus Heresy Atlas

Where to start

1. How to Read This Atlas

   The map, the timeline, the routes and the dossiers — a working protocol for reading, not a “pretty galaxy”.

2. The Fall of the Warmaster

   Davin, the anathame, the warrior lodges — why it was not a “villain” who fell but the best son.

3. Isstvan V: An Operational Analysis of the Drop Site

   Two waves, one depression, three struck-out Legions — how the geometry of trust kills more surely than valour.

4. The Siege of Terra: An Operational Outline

   The spheres of Sol, the ports, the engineer, the gods, the duel — five wars in one star.

5. Black Library Reading Order

   Several routes through some fifty books, tied to the events of the map: the spine, the wings, the Siege, the Black Books.

6. The First Investigation investigation

   How to use this atlas at all — through a single storyline, not a lecture

Eras of the war

1. Eve of the Storm 964.M30 — 003.M31 · 15 events

   Ullanor · Nikaea · Monarchia

   Open the era in the atlas
2. The Fall 004.M31 — 005.M31 · 16 events

   Davin · Prospero · Isstvan III

   Open the era in the atlas
3. The Isstvan Massacre 006.M31 · 15 events

   Drop Site Massacre · Signus

   Open the era in the atlas
4. Shadow of War 007.M31 — 009.M31 · 66 events

   Calth · Ruinstorm · Imperium Secundus · Molech

   Open the era in the atlas
5. The Road to Terra 010.M31 — 012.M31 · 45 events

   Tallarn · The Path of Heaven · Second Battle of Davin · Nyrcon

   Open the era in the atlas
6. The Siege of Terra 013.M31 — 014.M31 · 39 events

   Titandeath · Solar War · The Finale

   Open the era in the atlas
7. Epilogue — The Great Scouring 015.M31 — 019.M31 · 9 events

   Skalathrax · The Iron Cage · the scattering of the legions

   Open the era in the atlas

Investigations

• The First Investigation

  How to use this atlas at all — through a single storyline, not a lecture

• The Fall of the Warmaster

  From triumph to virus bombs: why it was not a villain who fell, but the best of the sons

• The Geometry of Isstvan V

  Why the second wave worked and what the striking out of three Legions does to the war

• How the East Was Subtracted

  Calth, the Ruinstorm, the Shadow Crusade: the operation that stole the Siege from Guilliman

• The Angel’s Path

  Signus → Secundus → the Eternity Gate: why the IX nevertheless manages to die in time

• Who Did Not Come to the Walls

  The Lion, Guilliman, Corax, Russ: a map of lateness, not a map of cowardice

• The Gates of Molech

  The Emperor’s secret, House Devine and the bargain after which Horus becomes a door

• The Two Truths of Prospero

  Nikaea, the breach of the Webway, a substituted order: how to read the extermination of the XV

• Five Layers of the Siege

  The Solar War, the walls, the Titans, the Webway, the deck of the Vengeful Spirit

• Thramas: A Hunt in the Night

  The Lion against Curze: the war that steals the I Legion from the Siege

Sections

• Chronology 205 events

  Every event of the war by era — the backbone of the annals on one page.

• Events 205 events

  Battles, massacres, political and warp events of the war — with dates, sides and outcomes.

• Systems 149 systems

  Worlds and systems of the theatre of war: what happened where, and whose homeworld it was.

• Legions 20 Legions

  The twenty Legiones Astartes: primarchs, homeworlds, side in the war and fate.

• Factions 146 factions

  Titan Legions, Knight Houses, the Mechanicum, fleets and other forces of both sides.

• Characters 131 characters

  Primarchs, champions, remembrancers and witnesses — role, side and key events.

• Duels 15 duels

  Duels that decided more than the outcome of a single fight.

• Campaigns 14 campaigns

  Theatres and operations: forces, turning points, outcome and significance.

• Siege of Terra

  The Siege of Terra phase by phase.

• Forces

  Strengths and composition of the sides’ forces, from the sources.

• Articles 27 articles

  Analyses of the war: why, not only what — with sources and disputed points.

• Investigations 10 investigations

  Step-by-step analyses of a single question on the map: time, corridor, conclusion.

• Books 60 books

  Black Library novels and Forge World Black Books in reading order.

• Disputes 6 disputes

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

• Themes 8 themes

  Threads running through the war: betrayal, absence, the warp, brotherhood.

• Glossary

  Terms of the Heresy era, explained.