Complex sentence: In the same year, the fortress of Kamacha on the Upper Euphrates fell to the Arabs, and the inhabitants of Sision (Ar. Susana) abandoned their city and migrated further west--according to Baladhuri, they were resettled along the Taurus Mountains.
Split into simpler sentences: In the same year, the fortress of Kamacha on the Upper Euphrates fell to the Arabs, and the inhabitants of Sision (Ar. Susana) abandoned their city and migrated further west. According to Baladhuri, they were resettled along the Taurus Mountains.