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. Meantime, the imperial generals, deficient both in troops and money, found themselves reduced to the disagreeable alternative of losing sight either of the King of Sweden, or of the Estates of the empire, since with a divided force they were not a match for either. The movements of the Protestants called their attention to the interior of the empire, while the progress of the king in Brandenburg, by threatening the hereditary possessions of Austria, required them to turn their arms to that quarter. After the conquest of Frankfort, the king had advanced upon Landsberg on the Warta, and Tilly, after a fruitless attempt to relieve it, had again returned to Magdeburg, to prosecute with vigour the siege of that town.