John, in fact, knew well how unsubstantial his apparent supremacy was, and how hollow were the foundations on which it rested. He knew that if he wished to prevent the fulfilment of Peter’s prophecy, he must now disarm once for all, and secure permanently for his own interest, some one at least of the various enemies, or groups of enemies, against whom he had been struggling for six years at such overwhelming odds. By the end of 1212 the signs of the times were beginning to point out who this one must be; by the early spring of 1213 there could no longer be any doubt on the point. The fortunes of war in Germany and in southern Gaul had shattered John’s hopes of crushing Innocent and Philip Augustus both at once. In Aquitaine Simon de Montfort and his “crusaders” were gradually winning their way against the Albigenses, and Raymond of Toulouse was practically ruined. In Germany the young King Frederic of Sicily had at the Pope’s instigation been elected to the empire in Otto’s stead. Otto sought to regain his footing in the country by marrying the daughter of his former rival, {August} Duke Philip of Suabia; but the bride died a few days after her marriage;[781] and in November (1212) the political league which Innocent was building up against Otto and John was completed by a treaty of alliance between Frederic and Philip Augustus.[782] Triumphant everywhere on the continent, Innocent resolved to make an end of matters with John. In the winter of 1212 Stephen Langton and the bishops of Ely and London carried to Rome in person their complaints against their sovereign, and their entreaties that such a state of things should be suffered to continue no longer. In January 1213 they returned to the French court accompanied by Pandulf, and bringing with them a letter from the Pope to the French king.[783] Innocent in this letter solemnly laid upon Philip, for his soul’s health, the task of expelling the English king from his realm, and bade him assume in John’s stead the sovereignty of England for himself and his heirs for ever.[784] It is said that the Pope wrote at the same time to the other sovereigns and princes of Europe, bidding them join under Philip’s leadership in a sort of crusade against John, and granting to all who should take part in this expedition the same privileges, temporal and spiritual, which were conferred on pilgrims to the Holy Sepulchre.[785]