Halo Alpha
Halo Alpha

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The Domus Diaspora, or Colonial Era,[1] was the era of mass migration of Humans from the Sol system to various star systems in the Orion Arm of the Milky Way galaxy.[2] The Domus Diaspora was organized by the Colonial Administration Authority.[3]



Following the Interplanetary War, population surges, a struggling economy and food problems created the need for colonies. Extra-solar colonies only became plausible in 2291 when Wallace Fujikawa and Tobias Shaw discovered Slipstream Space.[4] In 2310, the Colonial Administration Authority and the Colonial Military Administration were founded,[5] and a new line of colony ships were unveiled. Only in 2362 would the first wave of interstellar ships led by the Odyssey, leave the Sol system.[4]

The Inner Colonies[]

The Odyssey would spark the Domus Diaspora by settling Reach.[6] Colony after colony would be established. By 2390, 210 extra-solar colonies were established, and would comprise the "Inner colonies".[4]

The Outer Colonies[]

More and more colonies would continue to be founded far down Slipspace routes.[7] These would be the "Outer Colonies". They would be effectively established by 2490.[4] Many of these colonies would be largely unexplored and underdeveloped.[7]

Dissidence and the End[]

Between 2473 and 2485 protests and uprisings would took place.[3] In 2487, the People's Occupation and Secessionist Union would submit requests for a dozen worlds to secede from the CAA and Unified Earth Government.[8] Violence would begin when a massive rebellion on Far Isle was put down with Nuclear weapons.[9] In 2494, the Callisto Incident would spark the Insurrection, effectively ending the Domus Diaspora.

Despite the end of the Colonial Era, colonies and planets were still being found and colonized, especially after the Human-Covenant war. Oban, Erebus VII, and Eudemon X49-05 were all examples of this.





August 8[]
  • Tribute officially colonized by the CAA Casbah. Disputed by the crew of the CAA Irbid as having taken place on July 24.[10]









  1. Halo Mythos: A Guide to the Story of Halo - Pages 52 & 53
  2. Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo - Pages 8 & 9
  3. 3.0 3.1 Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo - Page 54
  4. 4.0 4.1 4.2 4.3 4.4 4.5 Xbox.com: Halo Storyline (Defunct, Copy on HBO Forums and Wayback Machine)
  5. Halo 4: The Essential Visual Guide - Page 228
  6. 6.0 6.1 Halo: The Essential Visual Guide - Page 151
  7. 7.0 7.1 Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo - Page 91
  8. Halo Mythos: A Guide to the Story of Halo - Page 55
  9. Halo: Ghosts of Onyx - Page 183, Quote:"Bandersnatch" was the code used for radiological- or energy-based disaster. Dr. Halsey had heard this used before from planetary bombardment by Covenant plasma and during the UNSC nuking of the Far Isle Colony to put down the rebellion of 2492.
  10. Halo Waypoint: Universe - Locations - Tribute
  11. Halo 4: The Essential Visual Guide - Page 228
  12. Halo Waypoint: Universe - Alluvion
  13. Halo: The Essential Visual Guide - Page 12
  14. Halo Waypoint: Universe - Meridian
  15. Official Halo Wars Community Site: Game Info - Timeline