In 1100, Tancred became the regent of Antioch after his uncle and predecessor Bohemond I of Antioch was taken prisoner for three years (1100–03) by Gazi Gümüshtigin of the Danishmends at the Battle of Melitene. Tancred expanded the territory of Antioch by conquering Byzantine Cilicia, Tarsus, and Adana in 1101 and founding the principality, Byzantine Latakia, in 1103. In 1107 Bohemond enraged by an earlier defeat when he, allianced with Edessa, attacked Aleppo, and Baldwin of Bourcq and Joscelin of Courtenay (Bourcq's most powerful vassal) were briefly captured, as well as the Byzantines recapturing of Cilicia and the harbor and lower town of Lattakieh, he renamed Tancred as the regent of Antioch and sailed for Europe with the intent of gaining support for an attack against the Greeks.