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The Tripoli was a remote station held by the UNSC, probably located in deep space. As of 2552, it was fully operational. That year, it was the meeting place for the UNSC Stalingrad and a small task force that had been assigned to go to Onyx to rescue the Spartan-IIs and Dr. Catherine Halsey, along with the prowler Dusk.^[1]

Sources

1. ↑ Halo: Ghosts of Onyx, Page 289