In 1302, Zaccaria was named admiral by Philip of France, in which capacity he conquered the island of Chios (1304), which had hitherto been in the hands of Moslem corsairs. At first, he gave the government of the island over to his nephew Tedisio.
In 1302, Zaccaria was designated admiral by Philip of France. In this capacity, he captured Chios (1304), which had been under Muslim pirate control. He then placed the governance of the island in the hands of his nephew Tedisio.