"The Sylesi were an advanced species native to the Gamma Quadrant who began relations with the Federation in the late 24th century, after the Dominion War. (Star Trek: Brave New Worlds)"@en . . . "Sylesi"@en . . "The Sylesi were an advanced species native to the Gamma Quadrant who began relations with the Federation in the late 24th century, after the Dominion War. (Star Trek: Brave New Worlds)"@en .