 The crusaders were unable to cross the Nile, and, suffering from disease and lack of supplies, retreated towards Damietta in April.They were defeated along the way at the Battle of Fariskur, with Louis being taken captive by Turanshah.During Louis' captivity, Turanshah was overthrown by his Mamluk soldiers, led by the general Aybak, who then released Louis in May in return for Damietta and a large ransom.