Horus Heresy · atlas

World · Segmentum Ultima · place disputed

Ullanor

Fig. 1 · Location on the map

Ullanor is Ullanor Prime, the capital of the ork empire; the site of the Triumph on Ullanor (000.M31), where Horus was proclaimed Warmaster. Later (M32) the world became Armageddon (Segmentum Solar); the Heresy-era location is an eastern / frontier ork holding.

Category
World
Location
Segmentum Ultima
Significance on the map
4 of 5
Place confidence
Place disputed
Events
1 event

Place on the map

The place is disputed: the canon locates it ambiguously; the point on the map is a cautious estimate.

Grounds for placing the system exactly here on the map:

Russian source notes (1) RU
  • «…original Great-Crusade segmentum NOT explicitly stated… later became Armageddon (Solar)» — Собственный свод «Карты Ереси» · факт-чек 2026 (спорно; помещён на восточно-солярный фронтир)

Events in the system

Legions

Legions named in the system’s events:

Factions

Named among the sides of the system’s events:

Characters

Linked to the system’s events:

Sources

  1. Lexicanum: Ullanor Prime
  2. WH40k Fandom: Armageddon
  3. Atlas compilation · source check 2026
Open in the atlas

Permalink: https://astart.es/en/systems/ullanor/