A defeat of an Egyptian invasion by the Franks of the kingdom of Jerusalem on the plain near Ibelin (mod. Yavne, Israel).
In May 1123 the Fātimid regime of Egypt sent a joint naval and land expedition to its forward base at the coastal city of Ascalon (mod. Tel Ashqelon, Israel) in southern Palestine, seeking to capitalize on the absence of King Baldwin II of Jerusalem, who had been captured by the Turks of northern Syria. When the Fātimid navy laid siege to Jaffa, the regent of Jerusalem, Eustace Granarius, sent for assistance to a Venetian fleet that was en route to the Holy Land and assembled the kingdom’s forces at Caco, southeast of Caesarea (mod. Har Qesari, Israel). They marched south, bypassing Jaffa, and met the Egyptian land army near Ibelin on 29 May 1123.
The Egyptians fled in the face of the first Frankish attack, which resulted in a major rout and a massacre of the Egyptian infantry. The Egyptian naval force was subsequently dispersed by the Venetian fleet. This was the last great Fātimid invasion of the kingdom of Jerusalem.