The Tierfon Sector Fleet represented an Imperial Sector Fleet. It was deployed to the Tierfon sector and directed by Fleet Admiral Tzenkens. Following the calamitous events of the Tocan system disaster, the Fleet was required to be rebuilt and refreshed. This circumstance provided an opportunity for the Alliance to Restore the Republic to extract starfighter squadrons from Tierfon, Homon, and also Farstey so they could take part in Operation Cobolt.