Arcana Sector

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Celtic Sector
(To be added)
Sector
Sector Governor	Maximus Mott
Sector Capital	Coronach
Segmentum	Segmentum Ultima

The Celtic Sector is a sector of Imperial space located north of the Galactic Core Region in the Ultima Segmentum. The Celtic Sector is made up of seven sub-sectors; Magmell, Erin, Alba, Cymru, Karnow, Vannin, and Breizh.

For Millennia, the Imperial Governor of the Celtic Sector has hailed from the "Mott Dynasty".

The main threat to the Celtic Sector are constant xenos invasions and the ever-present threat of Chaos incursions. The Celtic Sector is dutifully guarded by the Imperial Guard Regiments, Battlefleet Celtic, the Iron Spears Space Marine Chapter, and the Adepta Sororitas Order of the Gilded Rose.

Following the formation of the Cicatrix Maledictum, the Celtic Sector was cut off from the greater Imperium, becoming part of he Dark Imperium. To make matters worse, a warp storm known as the Daedalus Rift formed on the border of the Sector. The Void Stalkers Warband and other forces of Chaos use the Daedalus Rift to launch ceaseless attacks upon the servants of the Emperor. The Sector was partially reconnected with the Imperium through Roboute Guilliman's Indomitus Crusade.

Notable Systems and Planets

Magmell Subsector

• Dannu System
  • Coronach: Hive World that serves as the capital of the Celtic Sector and seat of the Celtic Sector Authority
    • Dagda: Satellite of Coronach.
  • Duilinn: Gas Giant
    • Tarana: Satellite of Duilinn. Produces Taranan Commando Regiments for the Imperial Guard
    • Navana: Satellite of Duilinn. Hive World that acts as a Naval Fortress
    • Aluinn: Satellite of Duilinn. Terrestrial Shrine World. Home to a fortress operated by the Sororitas Order of the Gilded Rose
    • Rothgonnon: Satellite of Duilinn. Forge World
• Victora System
  • Aesari: Environmentally-stunning Paradise World. Heavy Astra Telepathica presence.
  • Victora: Temperate Hive World that acts as the headquarters of the Victoran Legionaries Regiments of the Imperial Guard
    • Liraphelle: Satellite of Victora. Environmentally stunning civilized world that serves as the Sector Capital. The planetary population is condensed into a single Hive City, leaving the rest of the planet's ecosystem untouched.
    • Morhaven: Satellite of Victora. Urbanized Hive World

Erin Subsector

• Brigid System
  • Ailinne: A frozen Feudal/Death World that serves as the homeworld of the Iron Spears Chapter of the Adeptus Astartes
    • Ibrickane: Satellite of Ailinne. A cold and bleak Feral World that serves as the secondary recruitment world of the Iron Spears.
• Kern System
  • Darana: Agri-World
  • Fenia: Moorish planet that produces the Fenian Warrior Regiments for the Imperial Guard

Alba Subsector

• Hyrr System
  • Osthaven: Feudal World. Sometimes known as "Osthaven Prime". Secondary recruitment world for the Norden Huscarls
    • Ostahaven Secundus: Satellite of Osthaven. Acts as a Naval Fortress
  • Nordenheim: Frozen Death World that produces Norden Huscarl Regiments for the Imperial Guard
    • Syf: Satellite of Nordenheim. Home to a fortress operated by the Sororitas Order of the Gilded Rose
    • Tyr: Satellite of Nordenheim. Forgeworld. Headquarters of the Collegia Titanica's Legio Norsca

• Gorm System:
  • Gallowglass: Terrestrial Hive World that serves as the center of Battlefleet Celtic
  • Gorm: Death World that produces Gormic Warrior Regiments for the Imperial Guard

Cymru Subsector

• Morrigan System
  • Morrigan: Shrine World with a heavy Ecclesiarchy present. Unofficial "headquarters" of the Sisters of Battle Order of the Gilded Rose (charged with an eternal vigil over the Celtic Sector). A few milennia ago Morrigan was also classified as a War World.
• Svarog System
  • Svarog III: Principal Forge World and industrial heart of the Celtic Sector. Headquarters of the Collegia Titanica's Legio Ferox
  • Caldera: Mining World under the control of Svarog's Fabricator-General

Breizh Subsector

• Kilandros System
  • Kilandros: On the extreme edge of the Breizh Subsector lay Kildandros, an arid Ork World that is the homeworld and "capital" of the Mad Skullz Ork Klan. For millennia, the Imperium has been unable to completely exterminate the Orks on Kilandros and the surrounding systems. However, the Imperium has mostly been able to stop the Mad Skullz expansion or otherwise push the Mad Skullz back to Kilandros.
    • "Da Great Rok": Satellite of Kilandros. In the early 41st Millennium the Mad Skullz attempted to convert the planetoid into a massive "Attack Moon" and crash it into Holy Terra. The Orks' plans were stopped during the Battle of Da Great Rok where the nearly complete "battle station" was permanently immobilized.