From 1107 to 1108, Bohemond led a 'crusade' against Byzantium, with the Latins crossing the Adriatic in October 1107 and laying siege to the city of Durrës (in modern Albania), which is often regarded as the western gate of the Greek empire. Bohemond was outwitted by Alexius, who deployed his forces to cut the invaders' supply lines whilst avoiding direct confrontation. The Latins were weakened by hunger and proved unable to break the defenses of Durrës. Bohemond capitulated in September 1108 and was forced to accede to a peace accord, the Treaty of Devol. The terms of this agreement stipulated that Bohemond was to hold Antioch for the remainder of his life as the emperor's subject and the Greek patriarch was to be restored to power in the city. However Tancred refused to honor the Treaty of Devol in which Bohemond swore an oath, and it is not until 1158 that it truly became a vassal state of the Byzantine Empire. Six months after the Treaty of Devol Bohemond died, and Tancred remained regent of Antioch until his death during a typhoid epidemic in 1112.