In 1211 the crusaders attacked Count Raymond's territories. He had never yet been tried for the murder of the legate, of which he was accused; and already Philip of France had warned the Pope that in any question of Raymond's forfeiture, it was for the French King as suzerain and not for the Pope to proclaim it. By a visit to Rome Raymond hoped that he had gained permission to purge himself from the impending charges; but at the last moment this was pronounced impossible, because in having failed to clear his lands of heresy, as he had promised to do, he was forsworn. In a war of sieges De Montfort's skill took from Raymond everything except Toulouse and Montauban. Raymond's brother-in-law, Pedro II of Aragon, now intervened; but when Innocent III, misled by his legates, refused a further offer of purgation on the part of Raymond, Pedro formally declared war against De Montfort. He invaded and laid siege to Muret; but his forces were defeated and he was killed (1213). So far Innocent III had avoided the recognition of De Montfort's conquests in Toulouse. But early in 1215 he ratified the act of the Council of Montpellier which had elected Simon de Montfort as lord of the whole conquered land. Raymond, although he had never yet been tried, was declared deposed for heresy; and the fourth Lateran Council, while confirming this decision, left a small portion of the territory still unconquered, for his son. It seems likely that Innocent would have been willing to deal fairly with the Count of Toulouse; but by this time there were too many interested in the ruin of the House of Toulouse, and the Pope was deliberately misled by his legates. Hence it came that a judgment which might, as it was expected that it would, have righted a great wrong, proved only a signal for revolt. Raymond and his son were welcomed back by an united people, and finally in 1218 Simon de Montfort was killed while besieging Toulouse. [Sidenote: A war of aggression.]