Weyoun was a series of Vorta diplomats and leaders in the service of the Dominion during the late 24th century. Like all Vorta, Weyoun was a clone; at least eight copies were known to exist, five of which were encountered by the Federation. Weyoun became a well-known Vorta in the Duyi'zu Universe during the War in the Beta Quadrant serving as the Dominion representative to the Coalition of Independent States. In this capacity, he personally oversaw most aspects of the war, although his presence was largely to ensure the loyalty of Cardassian leaders such as Gul Dukat, Legate Damar, and Legate Broca. He was killed by Warlord Ru'afo in the Coalition Civil War, after he was a Pro-Alliance member

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