63. At last an army was organized, and Innocent announced that he himself would lead the host to the defense of the holy sepulchre; but his death intervened before the project was ripe. Andrew, king of Hungary, was the only monarch who had leisure or inclination to leave his dominions. He led the army to Palestine and defeated the Saracens, but failed to follow up his victory, and soon after abandoned the enterprise. The Duke of Austria, who succeeded him as leader, directed the whole energy of the crusade against Egypt; and Damietta, which commanded the river Nile, was chosen as the first point of attack. Finding themselves unable to successfully defend the city, the Moslems offered to yield the whole of Palestine to the Christians upon the condition of the evacuation of Egypt. With a blindness almost incredible these terms were refused, and a last attack made on the walls of Damietta. The besieged made but slight resistance, and the Christians entered the city, to find out of seventy thousand but three thousand remaining, so fearful had been the scourge of plague and famine. Several months were spent in Damietta. The climate either weakened the frames or obscured the understandings of the Christians, for after their conquest they remained inactive until the Moslems recuperated their army and were able to recapture Damietta and expel the Crusaders from Egypt. 64. With a view to the recovery of the Holy Land, Frederick II, of Germany, had been married to Iolante, the heiress of the kingdom of Jerusalem. His early life was spent in Sicily, in familiar intercourse with Jews and Arabs, and Sicily was to the last the favored portion of his dominion. The emperor's court was given up to unpardonable frivolities in the eyes of Pope Gregory IX, one of whose first pontifical acts was to summon Frederick to a new crusade. The emperor paid little heed to the aged Pope's exhortations and commands, postponing from time to time the period of his departure. He embarked at last, but in ten days returned. The Pope was not to be trifled with, and pronounced his excommunication. Frederick treated it with contempt, and appealed to Christendom to sustain him. For this be underwent a more tremendous excommunication, but his partisans in Rome raised an insurrection and expelled the Pope.