who had quickly succeeded in driving Maurice from his electorate. At Mühlberg in April 1547 he overtook the army of the Saxon elector. His victory was complete. John Frederick was taken prisoner, and a little later Philip of Hesse, after vainly prolonging the struggle, was induced to surrender. The rising in the other parts of northern Germany was also put down, and the two leaders of political Lutheranism were prisoners in the emperor's hands. The "Interim." Unable to shake the allegiance of John Frederick to the Lutheran faith, Charles kept him and Philip of Hesse in captivity and began to take advantage of his triumph, although Magdeburg was still offering a stubborn resistance to his allies. By the capitulation of Wittenberg the electorate of Saxony was transferred to Maurice, and in the mood of a conqueror the emperor met the diet at Augsburg in September 1547. His proposals to strengthen and reform the administration of Germany were, however, not acceptable to the princes, and the main one was not pressed; but the Netherlands were brought under the protection of the Empire and some minor reforms were carried through. A serious quarrel with the pope, who had moved the council from Trent to Bologna, only increased the determination of Charles to establish religious conformity. In consultation with both Romanist and Lutheran divines a confession of faith called the _Interim_ was drawn up; this was in the nature of a compromise and was issued as an edict in May 1548, but owing to the opposition of the Romanist princes it was not made binding upon them, only upon the Lutherans. There was some resistance to the _Interim_, but force was employed against Augsburg and other recalcitrant cities, and soon it was generally accepted. Thus all Germany seemed to lie at the emperor's feet. The Reformation had enabled him to deal with the princes and the imperial cities in a fashion such as no sovereign had dealt with them for three centuries. The imperial succession. The revolt of Maurice of Saxony.