Horus Heresy · atlas

014.M31 · The Siege of Terra · date approximate

Solar War: Third Sphere

Place: Sol System · Segmentum Solar

Fig. 1 · Place on the map

Inconclusive Jubal Khan’s White Scars meet the traitors’ strike above the galactic disc.

The combined Sons of Horus, Thousand Sons and Word Bearers under Abaddon, Ahriman, Zardu Layak and Sota-Nul skirted the galactic disc to strike the upper crest of Sol’s defensive Spheres. The loyalists foresaw this and met them with Jubal Khan’s White Scars; hundreds of minor skirmishes merged into a titanic fleet battle — orbital platforms and bastions against numbers and warp-sorcery.

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Sides

Loyalists

Legions

Special forces

Commanders

  • Jubal Khan

Traitors

Legions

Special forces

Commanders

Type
Fleet
Scale
4 of 5
Casualties
Not reconciled by the sources.

Significance

The White Scars hold the space above Sol while the outer Spheres collapse.

Disputed in the canon

  • The order of battle of the Solar War — the strike above the galactic disc (the Third Sphere of Dorn’s defence).

Sources

  1. Lexicanum: Solar War
  2. The Solar War (J. French)
  3. Atlas compilation · source check 2026

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