Horus Heresy · atlas

008.M31 · Shadow of War · date approximate

Defence of Tyros

Place: Armatura · Segmentum Ultima

Fig. 1 · Place on the map

Loyalist victory Legio Praesagius repels Legio Mordaxis and House Ærthegn.

In the Crusade of Iron among the Five Hundred Worlds of Ultramar, the loyalist Legio Praesagius (the “True Messengers”) beat back the onslaught of the traitor Legio Mordaxis, which was aided by the renegade House Ærthegn. A rare loyalist victory in the Titan battles of ravaged Ultramar.

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Sides

Loyalists

Special forces

Traitors

Special forces

Type
Battle
Scale
2 of 5

Significance

The loyalist Legio Praesagius holds the line in burning Ultramar.

Disputed in the canon

  • A Titan clash of the era of the Crusade of Iron in Ultramar (AT: Shadow and Iron).

Sources

  1. Adeptus Titanicus: Shadow and Iron
  2. Fandom: House Orhlacc
  3. Atlas compilation · source check 2026

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