With the Fatimids and Kalb poised against him, Hassan appealed for Salih's help to maintain their tribes' virtual autonomy throughout Syria against Fatimid encroachment. Accordingly, Salih mobilized his Kilabi forces to reinforce the Tayy in Palestine. The Bedouin leaders first encountered the Fatimid–Kalb army in the vicinity of Gaza, but, unable to halt their advance, they withdrew to the north. On 12 May or 25 May 1029, the two sides fought at al-Uqhuwana, on the eastern shores of Lake Tiberias. For unknown reasons, Hassan and his forces fled in the heat of battle, leaving Salih and his men to face Anushtakin's army alone. The Kilab were decisively defeated and Salih, his youngest son and his vizier were slain.