After much suffering, Louis was allowed to purchase his freedom and returned to France. There he spent long years of wise government, of noble guidance of his people, and of secret preparations which he dared not avow. At length in his old age he confessed to his astounded nation that he meant to make one more attempt against the Saracens. It was a vow to God, he said, and he begged his people for assistance. The age had outgrown crusades. Perhaps no one man in all Louis' domains believed in the possibility of his success. History scarce presents anywhere a spectacle more pathetic than this last crusade, compelled by the fire of a single enthusiast. In love of him, his soldiers followed him, though with despair at heart; and the weeping crowds who bade them farewell at their ships, mourned them as men already dead. They attempted to attack the Saracens first at Tunis, and there Louis died of fever. The crusades perished with him.[14] POPE AND EMPEROR With the wane of the crusading fervor waned also the power of the popes. Innocent had extended his authority by terror and physical force. But men soon ceased to find religious inspiration for such "holy wars," and the calls of later popes fell upon deafened ears. The democratic policy of Innocent's predecessors had rallied all Italy around them; but his successors seem to have failed to recognize their true sources of strength. They abandoned their allies and ruled with autocratic power. Italy became divided, half Guelf, half Ghibelline, Moreover, even Frederick II, the ward whom Innocent had placed on the imperial throne, refused to sanction the encroachments of papal authority over the empire. So the strife of emperor and pope began again, only to terminate with the utter defeat and extermination of the great house of Barbarossa. Their possessions in Southern Italy and Sicily were conferred by the popes upon Charles of Anjou, brother of Louis IX of France. But while the popes were thus temporarily successful in the giant contest against their greatest rival, to such partisan extremities were they driven by the necessities of the struggle, that the awakening world looked at them with doubtful eyes, began to question their spiritual rights and honors, as well as the temporal authority they claimed. In Charles of Anjou the popes soon found that they had but substituted one master for another. Charles was rapidly becoming as obnoxious to Rome as the emperors had ever been, when suddenly the tyranny of his French soldiers roused the Sicilians to desperation, and by the massacre of the Sicilian Vespers[15] the French power in Italy was crushed.