representing that the friendship of France, an essentially peaceful country, would protect them against the pretensions of the warlike emperor, and that their alliance with France would guarantee their "German liberties" against Austria, he hoped to separate them from the emperor in a neutral confederacy. However, Maximilian was not slow to make the counter proposal that France should form an alliance only with the Catholic estates, abandoning all the agree ments made so far with the Protestants. In this way it would be possible to isolate the Habsburgs and yet complete the Catholic restoration in western Europe. The basis of these negotiations from October, 1629, was the draft of a treaty between France and Bavaria. Richelieu transferred the negotiations with the emperor to the place where the College of Electors was in session, because he hoped here to come to a settlement with the estates. Success in these undertakings, however, was made difficult for Richelieu by the landing of Gustavus Adolphus on German soil in June. When the emperor announced (13 August, 1630) Wallenstein's resignation to the Electors, they declared themselves ready to aid him against Gustavus on condition that both the imperial troops and those of the different estates should be united under Maximilian as commander-in-chief. Ferdinand used the friendliness of the Electors to exert pressure upon the French negotiator. Although the latter was only to come to an agreement regarding upper Italy, still Ferdinand made him promise in the Peace of Ratisbon (13 October) that when the Duke of Nevers received Mantua and Montferrat in fief, France would neither attack the empire itself nor aid others in any manner to attack it, and that the Duke of Lorraine should be included in this agreement. This inperial success, however, came to nothing, hecause the estates and the emperor did not reach an agreement. The Protestant Electors, instead, invited the Protestant estates to meet at Leipzig and form a neutral party (Assembly of the Princes at Leipzig, February-April, 1631). The Catholics came to an agreement with the emperor that the imperial troops should be under the command of Tilly, but Maximilian had made up his mind that Tilly should only be employed to protect Bavaria against a possible attack by Gustavus Adolphus. He insisted, therefore, that the imperial troops and his own should not be united into one army. This enabled Richelieu, whose overthrow seemed certain in November, 1630, to avoid confirming the Peace of Ratisbon, and, contrary to agreement, to make the treaty of Bärwalde (23 January, 1631) with Gustavus Adolphus. In this treaty Gustavus, whom the need of money had finally made compliant, pledged himself to carry on war against the eniperor for four years.
VI. The War With Sweden Within The Empire.
—After Wallenstein's deposition Gustavus was able to clear the entire lower course of the Elbe of the imperial troops, which were disbanding and had no commander. His farther advance would take him through the territories of the Electors of Brandenburg and Saxony, and these princes refused to let him pass. Tilly thus gained time to assume command on the Elbe and Oder, and immediately attempted (February, 1631) to force Gustavus to a battle; but the latter was not to he drawn into one. During this period, in which no decisive action took place, Tilly's position became critical, because, as had happened at Stralsund, a Swedish detachment under Dietrich von Falkenberg had thrown itself into Magdeburg, in September, 1630, and, supported by the citizens, refused to permit the imperial troops to enter. Magdeburg was the city which Wallenstein had so carefully avoided. Tilly determined to take it, and stormed it on 20 May, 1631. But a fire, which the Swedes are accused of starting when they saw that the city was lost, laid it in ashes, and took from Tilly the advantage he had gained. In the meantime Gustavus had taken advantage of the withdrawal of his opponents towards Magdeburg to seize the fortresses of Frankfort and Landsberg on the middle course of the Oder, and to wring from the Elector of Brandenburg Küstrin and the fortress of Spandau at the junction of the Spree and the Havel Rivers. Fearing that the Elector of Saxony would also yield to Gustavus, Tilly tried to terrify the wavering ruler; this, however, forced the latter under the influence of the Lutheran general, von Arnim, who had formerly been an officer of Wallenstein's, and forming a temporary alliance with Sweden, on 17 September, 1631, the combined troops of Saxony and Sweden destroyed Tilly's army at Breitenfeld, near Leipzig. The An image should appear at this position in the text.The Emperor Ferdinand II (1578-1637) victory had a great moral effect, but did not decide the war. In northwestern Germany Pappenheim had an excellent position which enabled him to control the line of the Weser for the emperor, and the emperor and Bavaria had sufficient means to raise new troops. The strength of Gustavus Adolphus was always much below that of his enemies. Conscious of this,
From an old print he felt the necessity of entering rich districts which he could use for the support and strengthening of his troops; in addition he wished to come into communication with the Protestant estates of south-western Germany that were favourable to him, and perhaps hoped when there to persuade France to undertake a common war against the emperor. These views probably influenced his military decisions after the battle of Breitenfeld. He left the Saxons to occupy the Austrians by an attack on Prague, and without moving against Pappenheim he went straight towards the dioceses on the Main and the middle course of the Rhine in order first to defeat them, and then their chief, Maximilian, before striking a decisive blow against the emperor. While living in the centre of the empire during the winter of 1631-32 he prepared his plans to secure absolute Swedish control over the Protestant estates and to secularize the dioceses that had remained Catholic. He also carried out his schemes for using German money to increase the prosperity of Sweden.
Maximilian's fear of Sweden constantly increased, and in May, 1631, he made his first treaty with France. It was, however, very hard for him to assume a neutral position towards the Protestant princes who opposed the emperor and the empire. Gustavus Adolphus on his part was not inclined to spare the champion of Catholicism in the empire for the sake of Richelieu. Finally, Maximilian so completely lost courage that negotiations for a truce were begun in December, 1631, and the truce was concluded in January, 1632. For the emperor, this was the most dangerous moment of the war. The Saxons had taken Prague. Richelieu continued to be hostile although the emperor had agreed to the Treaty of Cherasco (April, 1631), in which he waived the recognition by the Duke of Nevers of his suzerainty over Mantua; this treaty replaced that of Ratisbon. Contrary to the agreement made at Cherasco, Richelieu did not withdraw his troops from Piedmont, but,
