He was succeeded by his brother, Fakhr al-Mulk, whose accession coincided with the arrival of the First Crusade.[3] At this point the Banu Ammar's territory spanned the port town of Tartus and the fortresses of Arqa, north of Tripoli, and Khawabi, north of Tartus, in addition to Tripoli, Jubayl and Jableh.[4] Fakhr al-Mulk had to face the continuous attacks of the Crusaders under Raymond of Saint-Gilles.