In 2375, Decos Prime was the main planet in the Decos planetary system. This planet was the site of a Federation base, located less than a day and a half's journey from Deep Space 9.

During this time, the Starfleet Chief of Operations at the base was Al Lorenzo. Lorenzo borrowed and returned Sisko's desk in the space of three days, and agreed to provide an induction modulator as payment, in a series of trades organized by Nog to accelerate repairs of the USS Defiant. (DS9: "Treachery, Faith and the Great River")