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 appointed admiral by Philip of France. As such, he seized control of the island of Chios (1304), which had been held by Muslim corsairs. Initially, he handed over the administration of the island to his nephew Tedisio.