Thus ended the first stage of the Thirty Years’ War, although some desultory fighting continued between the League and its opponents. The second began in 1625 with the formation, after much fruitless negotiation, of a Danish interference in the war. Protestant combination, which had the support of England, although its leading member was Christian IV., king of Denmark, who as duke of Holstein was a prince of the Empire, and who like other Lutherans was alarmed at the emperor’s successes. It was in this war that Europe first became familiar with the great name of Wallenstein. Unable himself to raise and equip a strong army, and restive at his dependence on the League, Ferdinand gladly accepted Wallenstein’s offer to put an army into the field at no cost to himself. After Wallenstein had beaten Mansfeld at the bridge of Dessau in April 1626, and Tilly had defeated Christian of Denmark at Lutter in the succeeding August, the two generals united their forces. Denmark was invaded, and Wallenstein, now duke of Friedland, was authorized to govern the conquered duchies of Mecklenburg and Pomerania; but his ambitious scheme of securing the whole of the south coast of the Baltic was thwarted by the resistance of the city of Stralsund, which for five months he vainly tried to take. Denmark, however, was compelled to conclude peace at Lübeck in May 1629.

Intoxicated by success, Ferdinand had issued two months before the famous Edict of Restitution. This ordered the restoration of all ecclesiastical lands which had come into the possession of the Protestants since the peace Dismissal of Wallenstein. of Passau in 1552, and, as several archbishoprics and bishoprics had become Protestant, it struck a tremendous blow at the emperor’s foes and stirred among them intense and universal opposition. A little later, yielding to Maximilian and his colleagues in the League, Ferdinand dismissed Wallenstein, whose movements had aroused their resentment, from his service. A more inauspicious moment could not have been chosen for these two serious steps, because in the summer of 1630 Gustavus Adolphus left Sweden at the head of a strong army for the purpose of sustaining the Protestant cause in Germany. At first this great king was coldly received by the Protestants, who were ignorant of his designs and did not want a stranger to profit by the internal disputes of their country. A mistake at the outset would probably have been fatal to him, but he saw the dangers of his position and moved so warily that in less than a year he had obtained the alliance of the elector of Saxony, a consequence of the terrible sack of Magdeburg by the imperialists in May 1631 and of the devastation of the electorate by Tilly. He had also obtained on his own terms the assistance of France, and was ready to enter upon his short but brilliant campaign.

Having captured Frankfort-on-Oder and forced the hesitating elector of Brandenburg, George William, to grant him some assistance, Gustavus Adolphus added the Saxon army to his own, and in September 1631 he met Tilly, at the head The campaign of Gustavus Adolphus. of nearly the whole force of the League, at Breitenfeld, near Leipzig, where he gained a victory which placed North Germany entirely at his feet. So utterly had he shattered the emperor’s power that he could doubtless have marched straight to Vienna; he preferred, however, to proceed through central into southern Germany, while his Saxon ally, the elector John George, recovered Silesia and Lusatia and invaded Bohemia. Würzburg and Frankfort were among the cities which opened their gates to the Swedish king as the deliverer of the Protestants; several princes sought his alliance, and, making the captured city of Mainz his headquarters, he was busily engaged for some months in resting and strengthening his army and in negotiating about the future conduct of the war. Early in 1632 he led his troops into Bavaria. In April he defeated Tilly at the crossing of the Lech, the imperialist general being mortally wounded during this fight, and then he took possession of Augsburg and of Munich. Before these events Ferdinand had realized how serious had been his mistake in dismissing Wallenstein, and after some delay his agents persuaded the great general to emerge from his retirement. The conditions, however, upon which Wallenstein consented to come to the emperor’s aid were remarkably onerous, but Ferdinand had perforce to assent to them. He obtained sole command of the imperial armies, with the power of concluding treaties and of granting pardons, and he doubtless insisted on the withdrawal of the Edict of Restitution, although this is not absolutely certain; in brief, the only limits to his power were the limits to the strength of his army. Having quickly assembled this, he drove the Saxons from Bohemia, and then marched towards Franconia, with the intention of crossing swords with his only serious rival, Gustavus Adolphus, who had left Munich when he heard that this foe had taken the field. The Swedes and their allies occupied Nuremberg, while the imperialists fortified a great camp and blockaded the city. Gustavus made an attempt to storm these fortifications, but he failed to make any impression on them; he failed also in inducing Wallenstein to accept battle, and he was forced to abandon Nuremberg and to march to the protection of Saxony. Wallenstein followed, and the two armies faced each other at Lützen on the 16th of November 1632. Here the imperialists were beaten, but the victory was even more disastrous to the Protestant cause than a defeat, for the Swedish king was among the slain.

The Swedes, whose leader was now the chancellor Oxenstjerna, were stunned by this catastrophe, but in a desultory fashion they maintained the struggle, and in April 1633 a new league was formed at Heilbronn between them and The league of Heilbronn and the death of Wallenstein. the representatives of four of the German circles, while by a new agreement France continued to furnish monetary aid. Of this alliance Sweden was the predominant member, but the German allies had a certain voice in the direction of affairs, the military command being divided between the Swedish general Horn and Bernhard, duke of Saxe-Weimar. About this time some discontent arose in the allied army, and to allay this Bernhard was granted the bishoprics of Würzburg and of Bamberg, with the title of duke of Franconia, but on the strange condition that he should hold the duchy as the vassal of Sweden, not as a vassal of the Empire. The war, thus revived, was waged principally in the valleys of the Danube and the Rhine, the Swedes, seizing Alsace while Bernhard captured Regensburg. Meanwhile Wallenstein was again arousing the suspicions of his nominal allies. Instead of attacking the enemy with his accustomed vigour, he withdrew into Bohemia and was engaged in lengthy negotiations with the Saxon soldier and diplomatist, Hans Georg von Arnim (1581-1641); his object being doubtless to come to terms with Saxony and Brandenburg either with or without the emperor’s consent. His prime object was, however, to secure for himself a great territorial position, possibly that of king of Bohemia, and it is obvious that his aims and ambitions were diametrically opposed to the ends desired by Ferdinand and by his Spanish and Bavarian allies. At length he set his troops in motion. Having gained some successes in the north-east of Germany he marched to succour the hardly pressed elector of Bavaria; then suddenly abandoning this purpose he led his troops back to Bohemia and left Bernhard of Saxe-Weimar in possession of the Danube valley. It is not surprising that a cry, louder than ever, now arose for his dismissal. Ferdinand did as he was required. In January 1634 he declared Wallenstein deposed from his command, but he was still at the head of an army when he was murdered in the following month at Eger. Commanded now by the king of Hungary, afterwards the emperor Ferdinand III., the imperialists retook Regensburg and captured Donauwörth; then, aided by some Spanish troops, they gained a victory at Nördlingen in September 1634, the results of which were as decisive and as satisfactory for them as the results of Breitenfeld had been for their foes two years before.

The demoralization of the Swedes and their allies, which was a consequence of the defeat at Nördlingen, was the opportunity of France. Having by clever diplomacy placed garrisons in several places in Alsace and the Palatinate, France takes part in the war. the king of France, or rather Cardinal Richelieu, now entered the field as a principal, made a definite alliance with Sweden at Compiègne in April 1635, and in the following month declared war and put four armies in motion. But the thoughts of many had already turned in the direction of peace, and in this manner John George of Saxony took the lead, signing in May 1635 the important treaty of Prague with the emperor. The vexed and difficult question of the ownership of the ecclesiastical lands was settled by fixing November 1627 as the deciding date; those who were in possession then were to retain them for forty years, during which time it was hoped a satisfactory arrangement would be reached. The Saxon elector gained some additions of territory and promised to assist Ferdinand to recover any lands which had been taken from him by the Swedes, or by other foes. For this purpose a united army was to serve under an imperial general, and all leagues were to be dissolved. In spite of the diplomatic efforts of Sweden the treaty of Prague was accepted almost at once by the elector of Brandenburg, the duke of Württemberg and other princes, and also by several of the most important of the free cities. It was only, in fact, the failure of Saxony and Sweden to come to terms which prevented a general peace in Germany. The Thirty Years’ War now took a different form. Its original objects were almost forgotten and it was continued mainly to further the ambitions of France, thus being a renewal of the great fight between the houses of Habsburg and of Bourbon, and to secure for Sweden some recompense for the efforts which she had put forward.

While the signatories of the peace of Prague were making ready to assist the emperor the only Germans on the other side were found in the army under Bernhard of Saxe-Weimar. The final stage of the war opened with considerable Bernhard of Saxe-Weimar. Swedish successes in the north of Germany, especially the signal victory gained by them over the imperialists and the Saxons at Wittstock in October 1636. At the same time good fortune was attending the operations of the French in the Rhineland, where they were aided by Bernhard of Saxe-Weimar, a satisfactory financial arrangement between these parties having been reached in the autumn of 1635. The year 1638 was an especially fortunate one for France and her allies. Bernhard’s capture of Rheinfelden and of Breisach gave them possession of the surrounding districts, but dissensions arose concerning the division of the spoil; these, however, were stopped by the death of Bernhard in July 1639, when France took his army into her pay. Thus the war continued, but the desire for peace was growing stronger, and this was reflected in the proceedings of the diet which met at Regensburg in 1640. Under Count Torstenssen the Swedes defeated the imperialists at Breitenfeld in 1642; three years later they gained another victory at Jankau and advanced almost to Vienna, and then the last decisive move of the war was made by the great French general, Turenne. Having been successful in the Rhineland, where he had captured Philippsburg and Worms, Turenne joined his forces to those of Sweden under Wrangel and advanced into Bavaria. Ravaging the land, they compelled the elector Maximilian to sign a truce and to withdraw his troops from the imperial army. When, however, the allied army had retired Maximilian repented of his action. Again he joined the emperor, but his punishment was swift and sure, as Turenne and Wrangel again marched into the electorate and defeated the Bavarians at Zusmarshausen, near Augsburg, in May 1648. A few minor operations followed, and then came the welcome news of the conclusion of the treaty of Westphalia.

The preliminary negotiations for peace were begun at Hamburg and Cologne before the death of the emperor Ferdinand II. in 1637. By a treaty signed at Hamburg in December 1641 it was agreed that peace conferences should meet The peace of Westphalia. at Münster and at Osnabrück in March 1642, the emperor treating with France in the former, and with Sweden in the latter city. The Roman Catholic princes of the Empire were to be represented at Münster and the Protestants at Osnabrück. Actually the conferences did not meet until 1645, when the elector of Brandenburg had made, and the elector of Saxony was about to make, a truce with Sweden, these two countries being withdrawn from the ravages of the war. In three years the many controversial questions were discussed and settled, and in October 1648 the treaty of Westphalia was signed and the Thirty Years’ War was at an end.

The Thirty Years’ War settled once for all the principle that men should not be persecuted for their religious faith. It is true that the peace of Westphalia formally recognized only the three creeds, Catholicism, Lutheranism and Effects of the Thirty Years’ War. Calvinism, but so much suffering had been caused by the interference of the state with individual conviction, that toleration in the largest sense, so far as law was concerned, was virtually conceded. This was the sole advantage gained from the war by the Protestants. The Catholics insisted at first on keeping all the ecclesiastical lands which had been taken from them before the Edict of Restitution in 1629. The Protestants responded by demanding that they should lose nothing which they had held before 1618, when the war began. A compromise was at last effected by both parties agreeing to the date 1624, an arrangement which secured to the Catholics their gains in Bohemia and the other territories of the house of Habsburg. The restoration of the elector palatine to part of his lands, and his reinstatement in the electoral office, were important concessions; but on the other hand, the duke of Bavaria kept the Upper Palatinate, the elector palatine becoming the eighth and junior member of the electoral college.

The country suffered enormous territorial losses by the war. Up to this time the possession of Metz, Toul and Verdun by France had never been officially recognized; now these bishoprics were formally conceded to her. She Loss of territory. also received as much of Alsace as belonged to Austria. To the Swedes were granted Western Pomerania, with Stettin, and the archbishopric of Bremen and the bishopric of Verden. These acquisitions, which surpassed the advantages Gustavus Adolphus had hoped to win, gave Sweden the command both of the Baltic and of the North Sea. In virtue of her German possessions Sweden became a member of the Empire; but France obtained absolute control of her new territories. There was a further diminution of Germany by the recognition of the independence of Switzerland and the United Provinces. Both had long been virtually free; they now for the first time took the position of distinct nations.

In the political constitution of Germany the peace of Westphalia did not so much make changes as sanction those already effected. The whole tendency of the Reformation had been to relax the bonds which united the various The Reformation and the political constitution. elements of the state to each other and to their head. It divided the nation into two hostile parties, and the emperor was not able to assume towards them a perfectly impartial position. His imperial crown imposed upon him the necessity of associating himself with the Roman Catholics; so that the Protestants had a new and powerful reason for looking upon him with jealousy, and trying to diminish his authority. The Roman Catholics, while maintaining their religion, were willing enough to co-operate with them for this object; and Germany often saw the strange spectacle of princes rallying round the emperor for the defence of the church, and at the same time striking deadly blows at his political influence. The diet was a scene of perpetual quarrelling between the two factions, and their differences made it impossible for the imperial chamber to move beyond the region of official routine. Thus before the Thirty Years’ War the Empire had virtually ceased to exist, Germany having become a loose confederation of principalities and free cities. For a moment the emperor Ferdinand appeared to have touched the ideal of Charles V. in so far, at least, as it related to Germany, but only for a moment. The stars in their courses fought against him, and at the time of his death he saw how far beyond his power were the forces with which even Charles had been unable to contend. The state of things which actually existed the peace of Westphalia made legal. So nearly complete was the independence of the states that each received the right to form alliances with any of the others, or with foreign powers, nominally on condition that their alliances should not be injurious to the emperor or to the Empire. Any authority which still lawfully belonged to the emperor was transferred to the diet. It alone had now the power of making laws, of concluding treaties in the name of Germany, and of declaring war and re-establishing peace. No one, however, expected that it would be of any real service. From 1663 it became a permanent body, and was attended only by the representatives of the princes and the cities; and from that time it occupied itself mainly with trifles, leaving the affairs of each state to be looked after by its own authorities, and those of the country generally to such fortunes as chance should determine.