in which Melanchthon, Bucer, and Johann Pistorius the Elder represented the Protestant side. Philip was successful in securing the permission of the Emperor to establish a university at Marburg, and in return for the concession of an amnesty, he agreed to stand by Charles against all his enemies, excepting Protestantism and the Schmalkaldic League; to make no alliances with France, England, or the duke of Cleves; and to prevent the admission of these powers into the Schmalkaldic League. For his part, the Emperor agreed not to attack him in case there was a common war against all Protestants. These arrangements for special terms led to the collapse of Philip's position as leader of the Protestant party. He had become an object of suspicion, and, although the league continued to remain in force, and gained some new adherents in succeeding years, its real power had dissipated. But while only Albrecht VII, Duke of Mecklenburg, and Henry V, Duke of Brunswick-Lüneburg, of the secular princes were still faithful to the Roman Catholic cause, and while united action might at the time easily have resulted in the triumph of Protestantism, there was no union of purpose. Duke Maurice of Saxony and Joachim II of Brandenburg would not join the Schmalkaldic League; Cleves was successfully invaded by imperial troops; and Protestantism was rigorously suppressed in Metz. In 1543 the internal dissensions of the Protestant league compelled Philip to resign from its leadership and to think seriously of dissolving it. He put his trust entirely in the Emperor's good faith, agreeing to help him against both the French and the Turks. At the Diet of Speyer in 1544 he championed the Emperor's policy with great eloquence. The bishop of Augsburg declared he must be inspired by the Holy Spirit, and Emperor Charles V now intended to make him commander-in-chief in the next war against the Turks. Resumption of hostility to Charles The situation was suddenly changed, however, and Philip was tardily forced again into the opposition against the Emperor, by the Treaty of Crépy of 1544, which opened his eyes to the danger threatening Protestantism. He prevented the Roman Catholic Duke Henry V of Brunswick-Lüneburg from taking forcible possession of his dominions and unsuccessfully planned a new alliance with German princes against Austria, pledging its members to prevent the acceptance of the decrees of the projected Council of Trent. When this failed, he sought to