Everywhere anxiety reigned supreme, for there were lacking both preparedness and unanimity. The Catholic Princes of the Empire were not much better than the rest. Petty interests and jealousies outweighed in many instances a sense of the common needs. At Spires, for instance, Duke George of Saxony stipulated, as a condition of any promise of assistance, that he should be given precedence over both the Dukes of Bavaria. While the Catholic Estates agreed, at the Diet of Augsburg, to the grants for the war against the Turks, the Protestant Estates were not to be induced to give a favourable decision until the Emperor had sanctioned the so-called religious Peace of Nuremberg in 1532.[227] In the summer of that same year Suleiman passed Buda-Pesth with 300,000 men. Thence he continued his march along the Danube with the intention of taking Vienna, this time at any cost. The Emperor Charles V. hurried in person to command the great army which was collecting near Vienna; the Sultan was to be encountered and a decisive battle fought. Throughout the Empire the greatest enthusiasm for the cause prevailed. The Electoral Prince, Joachim of Brandenburg, was nominated by the Emperor to the command of the troops of the Saxon lowlands, since this country had not been unanimous in the choice of a Captain, probably owing to the religious dissensions. The Protestant Prince Joachim requested a pious letter from Luther. This Luther sent him, promising him his prayers, and saying that “he would take the field in spirit with his dear Emperor Carol [as he now calls him], and fight under his banner against Satan and his members.” He prayed God to bestow on them all “a glad spirit,” granting them not to trust in their own strength, but to fight with the “fear of God, trusting in His Grace alone,” and to ascribe the honour to heaven only; hitherto there had been too much of the “spirit of defiance on both sides,” and each party had gone into the field “without God,” “which on every occasion had been worse for the people of God than for the enemy.” Luther was evidently quite incapable of writing on the subject without his polemical ideas casting their shadow over his field of vision.