Fifth Crusade

The Fifth Crusade (1217–1221) was an attempt to take back Jerusalem and the rest of the Holy Land by first conquering the powerful Ayyubid state in Egypt.Pope Honorius III organized crusading armies led by Leopold VI of Austria and Andrew II of Hungary, and a foray against Jerusalem ultimately left the city in Muslim hands. Later in 1218 a German army led by Oliver of Cologne and a mixed army of Dutch, Flemish and Frisian soldiers led by William I, Count of Holland arrived. In order to attack Damietta in Egypt, they allied with the Seljuk Sultan of Rum in Anatolia, who attacked the Ayyubids in Syria in an attempt to free the Crusaders from fighting on two fronts.
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Noun
1. a Crusade under papal control from 1218 to 1221 that achieved military victories but failed when dissension arose over accepting the terms they had been offered
(hypernym) Crusade