013.M31 · The Siege of Terra · date approximate
Battle of the Diavanos System
Place: Diavanos System · Segmentum Ultima
Loyalist victory Guilliman boards the “Gladiator” and disarms a cyclonic torpedo.
World Eaters centurion Deranax with a fleet ambushed the Blood Angels rushing to Terra, springing a trap at Diavanos. A plea for help broke through the weakening Ruinstorm to Guilliman, who turned the Ultramarines to the rescue. The primarch boarded the World Eaters’ flagship “Gladiator” and fought through to the torpedo bays to disarm a cyclonic torpedo.
Sides
- Type
- Fleet
- Scale
- 2 of 5
Significance
The Ultramarines clear the way for the Blood Angels to the Siege of Terra.
Disputed in the canon
- The weakening Ruinstorm; the Blood Angels’ dash to Terra.
Sources
- Lexicanum: Battle of the Diavanos System
- Ruinstorm (D. Annandale)
- Atlas compilation · source check 2026
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