Horus Heresy · atlas

004.M31 · The Fall · date approximate

Magnus’ Folly: the Webway Breach

Place: Terra · Segmentum Solar

Fig. 1 · Place on the map

Atrocity Magnus’s psychic warning shatters the Webway’s defences beneath the Palace.

Seeking to warn the Emperor of Horus’s treachery, Magnus tore through the psychic wards of the Imperial Webway project beneath the Palace with forbidden sorcery — and daemons poured into the tunnels. From that moment the Emperor is chained to the Golden Throne to hold the breach: the War in the Webway begins.

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Sides

Loyalists

Special forces

Commanders

Traitors

Special forces

Commanders

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

Significance

The reason the Emperor remains on the Throne for the whole of the Heresy and cannot go out to meet Terra in the hour of the siege.

Disputed in the canon

  • The event is closely tied to the Council of Nikaea and the Burning of Prospero; dated c. 004.M31.

Sources

  1. WH40k Fandom: Horus Heresy Chronology
  2. Master of Mankind (A. Dembski-Bowden)
  3. Lexicanum: War Within the Webway

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