Horus Heresy · atlas

014.M31 · The Siege of Terra · date approximate

Fall of Colossi Gate

Place: Terra · Segmentum Solar

Fig. 1 · Place on the map

Traitor victory The Colossi Gate falls at the same time as the assault on the Saturnine Gate fails.

While the traitors’ underground strike on the Saturnine Gate was failing, the neighbouring Colossi Gate fell under the besiegers’ onslaught. Its capture narrowed the ring around the inner regions of the Palace, leaving the Eternity Wall Spaceport and the Saturnine complex under threat.

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Type
Siege
Scale
3 of 5

Significance

Another line of the Palace is lost; the ring around the Sanctum tightens.

Disputed in the canon

  • A siege fragment of 390.014.M31: the Colossi Gate fell when the assault on the Saturnine Gate failed.

Sources

  1. Lexicanum: Siege of Terra
  2. Atlas compilation · source check 2026

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