Horus Heresy · atlas

Ship · traitors

Alpha & Beta

Alpha and Beta — twin Gloriana-class flagships of the Alpha Legion, echoing the twins Alpharius and Omegon. When the treachery was revealed, Beta turned its guns on the Imperials with the support of Alpha; Alpharius aboard Alpha led the fleet toward the Sol system. Both ships vanished after the Heresy with no recorded destruction.

Category
Ship
Side
Traitors
Key events
2 events
Forces
Paired flagships of Alpharius / Omegon / the Alpha Legion (XX); both Gloriana-class — the legion uniquely held two flagships, echoing the two twin primarchs.

Fate

Both vanished after the Heresy — after the death of one twin and the disappearance of the other, Alpha and Beta also suddenly vanished; there have been no credible sightings since.

Key events

Sources

  1. Lexicanum: Alpha
  2. Lexicanum: Beta
  3. Legion (Dan Abnett)
  4. Atlas compilation · source check 2026
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