The Berber and Arab armies finally clashed at the Battle of Bagdoura (or Baqdura) in October-November, 741, by the Sebou river (near modern Fes). Disdaining the experience and cautious advice of the Ifriqiyans, Kulthum ibn Iyad made several serious tactical errors. Berber skirmishers dehorsed and isolated the Syrian cavalry, while the Berber foot fell upon the Arab infantry with overwhelming numbers. The Arab armies were quickly routed. By some estimates, two-thirds of the Arab army were killed or captured by the Berbers at Bagdoura. Among the casualties were the new governor Kulthum ibn Iyad al-Qasi and the Ifriqiyan commander Habib ibn Abi Obeida al-Fihri.