The 5th Crusade was launched in 1208 by Pope Innocent III to destroy the Ayyubid Empire and recapture Jerusalem. King Andrew of Hungary, Duke Leopold VI of Austria, and John of Brienne led forces from France, Hungary, Germany, the Netherlands, Flanders, and Frisia in battles centered around Cairo, Egypt. The crusade ultimately failed when the crusaders' army surrendered after the Nile River flooded and supplies ran low, forcing another crusade to retake Jerusalem.