Al-Mansur, the Emir of Homs and an-Nasir Dawud, ruling Kerak, joined the Templars, the Hospitallers, the Teutonic Knights, the Order of Saint Lazarus,[1] and the remaining forces of the Kingdom of Jerusalem to take the field against the Egyptian Sultanate.

The Egyptian army was commanded by a Mamluk officer named Rukn al-Din Baybars al-Salihi which was slightly inferior in strength to its opponents.

Threatened by the Egyptians in front and the Khwarezmians on their flank, the Crusaders charged the Mamluks facing them and were initially successful, pushing them back and causing Baybars some concern.

Their assault gradually lost momentum as the Khwarezmid tribesmen attacked the rear and the flanks of the Christian forces, which were defended by disorganized infantry.

Pope Innocent IV at the First Council of Lyon in 1245 called for a new Crusade, the seventh, but the Franks were never again to muster major power in the Holy Land.

[5] While the Battle of Hattin holds great symbolic importance as having led to the fall of Jerusalem, it was Forbie that truly marked the collapse of Christian power in Outremer.