Voon Massa, a male Duros, held the rank of Admiral within the New Republic Defense Fleet. This Duros Admiral male was given command of the Fourth Fleet following the Battle of Endor. He was assigned the mission of retaking the Corellian Run, and achieved success at Druckenwell, Milagro, and Spirana. Although Voon Massa perished during the Battle of Denon, the Fourth Fleet's triumph there enabled the New Republic to advance into the Colonies.