Horus Heresy · atlas

006.M31 · The Isstvan Massacre · date disputed

The Signus Campaign · Signus Prime

Place: Signus Cluster · Segmentum Ultima

Fig. 1 · Place on the map

Pyrrhic loyalist victory Sanguinius banishes Ka’Bandha, but the Red Thirst and the Black Rage are born.

Horus lured the Blood Angels into the Signus Cluster in order to destroy them; there a trap of daemonic legions awaited them. At Signus Prime the Bloodthirster Ka’Bandha shattered Sanguinius’s legs and with the Ragefire cut down hundreds of his sons, awakening the Red Thirst. Recovering, Sanguinius banished the Bloodthirster and cleansed the cluster, but the Legion suffered terrible losses.

Open in the atlas

Sides

Loyalists

Legions

Special forces

Commanders

Traitors

Special forces

Commanders

  • Ka’Bandha
  • Kyriss the Perverse
  • Erebus
Type
Warp
Scale
4 of 5
Casualties
Blood Angels: at least 10,000 killed, ~88,000 seriously wounded; almost all of the attached Custodians and Wolves.

Significance

The origin of the IX Legion’s genetic flaws — the Red Thirst and the Black Rage.

Disputed in the canon

  • The climax is c. 005–006.M31 (Lexicanum / “Fear to Tread”); the Fandom chronicle gives a broad span of the campaign, 004–009.M31.

Sources

  1. Lexicanum: Signus Campaign
  2. WH40k Fandom: Signus Campaign
  3. Fear to Tread (J. Swallow)
  4. FW Black Book VIII: Malevolence

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