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The Colonial Administration Authority, abbreviated CAA, was an organization under the ultimate control of the Unified Earth Government.


Prior to 2525, the CAA pressured the government of Harvest to create a colonial militia. Rol Pedersen, the Attorney General, accepted this request.[2]

Over the course of the Human-Covenant war, the UNSC had largely taken over many of the responsibilities of other branches of the government. The CAA was described as "a little more resistant to the idea than the UEG and has subsequently been stripped of most of its power." It is therefore likely that the organization no longer exists in any functional capacity by 2552,[3] though the CAA Factbook was still being updated as late as 2550.[4] Tools used during the Insurrection created by the CAA, were eventually engineered into the Copperhead Armor.[5]


The CAA acted as a secondary governing body that helped the UEG govern the various colony worlds of humanity.[3] In addition, the CAA kept extensive files on every colony, world, and city under its care. The document containing these files was referred to as the CAA Factbook.[4] These files contained everything from topographic maps to the information on the materials the city sewer system was built from. The CAA provided this information to ONI special weapons teams upon request. It would be very helpful when it came to defending colonies from Covenant attack.[6] Agriculture Operations AIs also reported to the CAA, sending in annual maintenance reports.[7]



CAA Navy ShipsEdit


  • Though most sources refer to it as Colonial Administration Authority, in Halo: Contact Harvest, the organization is referred to and known as just the "Colonial Authority", however it may have been shortened. Propaganda in Halo 3: ODST also describes a "UNSC Colonial Authority," which may indicate total absorption into the UNSC.
  • Colonial credits were favored by Venezians as their standard currency.



  1. As the charter is mentioned to deal with colonial sovereignty, it likely acts like the CAA's constitution.