Flag Cestus III Colony was the official name for the colony on planet Cestus III, admitted as a Federation member state in the year 2271. The colony had originally been established in 2265 as a Starfleet outpost, the Cestus III outpost, that was destroyed by the Gorn Hegemony in 2267. After diplomacy was established between the Federation and the Gorn, a treaty allowed the resettlement of the world by both parties.