Damascus Materials Testing Facility
From Halopedia, the Halo wiki
The Damascus Materials Testing Facility was a UNSC base located in the Chi Ceti system on planet Chi Ceti IV. This top-secret base is where the Spartan soldiers were relocated for their final stage of training and the inclusion of their MJOLNIR Mark V Battle Armor in 2525. Though it was only manned by three technicians, it had a curious feature, which was that a dozen AIs could operate in the facility in close proximity to one another, which is normally impossible for technical reasons.