The armies of the Fifth Crusade leave Acre for Damietta in Egypt. The leaders of the Crusade, Duke Leopold VI of Austria and King Andrew II of Hungary, think that if they can capture Egypt, the conquest of Jerusalem will go much more quickly and easily.
The Crusaders will besiege Damietta for several months and conquer it on November 5, 1219. They will be offered control of Jerusalem in exchange for leaving Egypt but refuse because papal legate Pelagius is determined to see Egypt under Christian control. Instead, the army will be trapped at al-Mansurah on the Nile in 1221 and be forced to surrender.