This project was peculiarly flattering to the Saxon Elector, to whom the idea of being dependent upon Sweden, or of longer submitting to the tyranny of the Emperor, was equally hateful. He could not, with indifference, see the control of German affairs wrested from him by a foreign prince; and incapable as he was of taking a principal part, his vanity would not condescend to act a subordinate one. He resolved, therefore, to draw every possible advantage from the progress of Gustavus, but to pursue, independently, his own separate plans. With this view, he consulted with the Elector of Brandenburg, who, from similar causes, was ready to act against the Emperor, but, at the same time, was jealous of Sweden. In a Diet at Torgau, having assured himself of the support of his Estates, he invited the Protestant States of the empire to a general convention, which took place at Leipzig, on the 6th February 1631. Brandenburg, Hesse Cassel, with several princes, counts, estates of the empire, and Protestant bishops were present, either personally or by deputy, at this assembly, which the chaplain to the Saxon Court, Dr. Hoe von Hohenegg, opened with a vehement discourse from the pulpit. The Emperor had, in vain, endeavoured to prevent this self-appointed convention, whose object was evidently to provide for its own defence, and which the presence of the Swedes in the empire, rendered more than usually alarming. Emboldened by the progress of Gustavus Adolphus, the assembled princes asserted their rights, and after a session of two months broke up, with adopting a resolution which placed the Emperor in no slight embarrassment. Its import was to demand of the Emperor, in a general address, the revocation of the Edict of Restitution, the withdrawal of his troops from their capitals and fortresses, the suspension of all existing proceedings, and the abolition of abuses; and, in the mean time, to raise an army of 40,000 men, to enable them to redress their own grievances, if the Emperor should still refuse satisfaction.
A further incident contributed not a little to increase the firmness of the Protestant princes. The King of Sweden had, at last, overcome the scruples which had deterred him from a closer alliance with France, and, on the 13th January 1631, concluded a formal treaty with this crown. After a serious dispute respecting the treatment of the Roman Catholic princes of the empire, whom France took under her protection, and against whom Gustavus claimed the right of retaliation, and after some less important differences with regard to the title of majesty, which the pride of France was loth to concede to the King of Sweden, Richelieu yielded the second, and Gustavus Adolphus the first point, and the treaty was signed at Beerwald in Neumark. The contracting parties mutually covenanted to defend each other with a military force, to protect their common friends, to restore to their dominions the deposed princes of the empire, and to replace every thing, both on the frontier and in the interior of Germany, on the same footing on which it stood before the commencement of the war. For this end, Sweden engaged to maintain an army of 30,000 men in Germany, and France agreed to furnish the Swedes with an annual subsidy of 400,000 dollars.
If the arms of Gustavus were successful, he was to respect the Roman Catholic religion and the constitution of the empire in all the conquered places, and to make no attempt against either.
All Estates and princes whether Protestant or Roman Catholic, either in Germany or in other countries, were to be invited to become parties to the treaty; neither France nor Sweden was to conclude a separate peace without the knowledge and consent of the other; and the treaty itself was to continue in force for five years.
Great as was the struggle to the King of Sweden to receive subsidies from France, and sacrifice his independence in the conduct of the war, this alliance with France decided his cause in Germany. Protected, as he now was, by the greatest power in Europe, the German states began to feel confidence in his undertaking, for the issue of which they had hitherto good reason to tremble. He became truly formidable to the Emperor. The Roman Catholic princes too, who, though they were anxious to humble Austria, had witnessed his progress with distrust, were less alarmed now that an alliance with a Roman Catholic power ensured his respect for their religion. And thus, while Gustavus Adolphus protected the Protestant religion and the liberties of Germany against the aggression of Ferdinand, France secured those liberties, and the Roman Catholic religion, against Gustavus himself, if the intoxication of success should hurry him beyond the bounds of moderation.
The King of Sweden lost no time in apprizing the members of the confederacy of Leipzig of the treaty concluded with France, and inviting them to a closer union with himself. The application was seconded by France, who spared no pains to win over the Elector of Saxony.
Gustavus was willing to be content with secret support, if the princes should deem it too bold a step as yet to declare openly in his favour.
Several princes gave him hopes of his proposals being accepted on the first favourable opportunity; but the Saxon Elector, full of jealousy and distrust towards the King of Sweden, and true to the selfish policy he had pursued, could not be prevailed upon to give a decisive answer.
The resolution of the confederacy of Leipzig, and the alliance betwixt France and Sweden, were news equally disagreeable to the Emperor.
Against them he employed the thunder of imperial ordinances, and the want of an army saved France from the full weight of his displeasure.
Remonstrances were addressed to all the members of the confederacy, strongly prohibiting them from enlisting troops. They retorted with explanations equally vehement, justified their conduct upon the principles of natural right, and continued their preparations.
