Emperor Alexios had been ready for the…

Emperor Alexios had been ready for the Italo-Norman invasion, and defeats Bohemond’s attempt, forcing Bohemond to surrender and negotiate with him at the imperial camp at Diabolis (Devol), where Alexios, anxious to end the war, offers Bohemond Antioch and other Greek cities in return for vassalage.

Under the humiliating terms of the Treaty of Devol, named after the imperial fortress of Devol, located south of Lake Ohrid in what is today the southeastern corner of Albania (Devoll District), Bohemond agrees to become a vassal of the Emperor and to defend the Empire whenever needed.

He also accepts the appointment of a Greek Patriarch.

In return, he is given the titles of sebastos and doux (duke) of Antioch, and he is guaranteed the right to pass on to his heirs the County of Edessa.

The treaty is also signed by Coloman's envoys, or, as Anna Komnene refers to them, "the ambassadors who came from the Dacians on behalf of the kral".

Although the treaty is not immediately enforced, it is intended to make the Principality of Antioch a vassal state of the Empire.