upon them. Robert de Artois (brother of Louis IX) who took refuge in a house and William of Salisbury were among those who were killed in Al Mansurah. Only five Knights Templar survived the battle. The crusaders were forced to retreat in disorder to Gideila where they camped within a ditch and wall. Early in the morning of February 11, the Muslim forces launched an offensive against the Franks' camp. For many weeks the Franks were forced to remain in their camp enduring an exhausting guerilla war.<ref>After the crusaders captured Damietta, general emergency was declared in Egypt, called al-Nafir al-Am Commones joined the battling zone and raided the crusaders camp frequently — Al-Maqrizi, p.446/vol.1, p.456/vol1. Ibn Taghri, pp.102-273/vol.6.</span></ref> Many crusaders were captured and taken to Cairo. Battle On 27 February Turanshah, the new Sultan, arrived in Egypt from Hasankeyf and went straight to Al Mansurah to lead the Egyptian army. Ships were transported overland and dropped in the Nile (in Bahr al-Mahala) behind the ships of the crusaders cutting the reinforcement line from Damietta and besieging the crusade force of King Louis IX. The Egyptians used Greek fire and destroyed and seized many ships and supply vessels. Soon the besieged crusaders were suffering from devastating attacks, famine and disease. Some crusaders lost faith and deserted to the Muslim side. King Louis IX proposed to the Egyptians the surrender of Damietta in exchange for Jerusalem and some towns on the Syrian coast. The Egyptians, aware of the miserable situation of the crusaders, refused the besieged king's offer. On 5 April covered by the darkness of night, the crusaders evacuated their camp and began to flee northward towards Damietta. In their panic and haste they neglected to destroy a pontoon bridge they had set over the canal. The Egyptians crossed the canal over the bridge and followed them to Fariskur where the Egyptians utterly destroyed the crusaders on 9 April. Thousands of crusaders were killed or taken prisoner. King Louis IX and a few of his nobles who survived were captured in the nearby village of Moniat Abdallah (now Meniat el Nasr) where they took refuge. Louis IX surrendered to a eunuch named al-Salihi after he was promised he would not be killed and together with his two brothers Charles d'Anjou and Alphonse de Poitiers he was taken to Al Mansurah where he was imprisoned in the house of Ibrahim ben Lokman,