[March of French armies on Bavaria, Sept.] It only remained for Napoleon to avenge himself upon Austria through the army which was baulked of its English prey. On the 1st of September, when the Austrians were now on the point of crossing the Inn, the camp of Boulogne was broken up. The army turned eastwards, and distributed itself over all the roads leading from the Channel to the Rhine and the Upper Danube. Far on the north-east the army of Hanover, commanded by Bernadotte, moved as its left wing, and converged upon a point in Southern Germany half-way between the frontiers of France and Austria. In the fables that long disguised the true character of every action of Napoleon, the admirable order of march now given to the French armies appears as the inspiration of a moment, due to the rebound of Napoleon's genius after learning the frustration of all his naval plans. In reality, the employment of the "Army of England" against a Continental coalition had always been an alternative present to Napoleon's mind; and it was threateningly mentioned in his letters at a time when Villeneuve's failure was still unknown. [Austrians invade Bavaria, Sept. 8.] The only advantage which the Allies derived from the remoteness of the Channel army was that Austria was able to occupy Bavaria without resistance. General Mack, who was charged with this operation, crossed the Inn on the 8th of September. The Elector of Bavaria was known to be secretly hostile to the Coalition. The design of preventing his union with the French was a correct one; but in the actual situation of the allied armies it was one that could not be executed without great risk. The preparations of Russia required more time than was allowed for them; no Russian troops could reach the Inn before the end of October; and, in consequence, the entire force operating in Western Germany did not exceed seventy thousand men. Any doubts, however, as to the prudence of an advance through Bavaria were silenced by the assurance that Napoleon had to bring the bulk of his army from the British Channel. [113] In ignorance of the real movements of the French, Mack pushed on to the western limit of Bavaria, and reached the river Iller, the border of Würtemberg, where he intended to stand on the defensive until the arrival of the Russians. [Mack at Ulm, October.] [Capitulation of Ulm, Oct. 17.]