Pope Innocent proclaimed the Fifth Crusade in 1213, with the liberation of the Holy Land (the reconquest of Jerusalem) its principal object. The first crusader troops, commanded by Leopold VI of Austria, landed at Acre in early September 1217. Andrew II of Hungary and his army followed that month, and Hugh I of Cyprus and Bohemond IV of Antioch soon joined the crusaders. However, hundreds of crusaders soon returned to Europe because of a famine following the previous year's poor harvest. A war council was held in the tent of Andrew II, who considered himself the supreme commander of the crusader army. Other leaders, particularly John, did not acknowledge Andrew's leadership. The crusaders raided nearby territory ruled by Al-Adil I for food and fodder, forcing the sultan to retreat in November 1217. In December John besieged the Ayyubid fortress on Mount Tabor, joined only by Bohemond IV of Antioch. He was unable to capture it, which encouraged the infidel, according to the contemporary Jacques de Vitry.