It controlled the area west of the Euphrates , and held the border against Antioch .
Turbessel was firstly the lordship of Joscelin I when he was not yet the Count of Edessa .
Edessa controlled the area west of the Euphrates , and held the border against Antioch .
Turbessel was firstly the lordship of Joscelin I when he was not yet the Count of Edessa .