Napoleon was now close upon Vienna. A few days after the capitulation of Ulm thirty thousand Russians, commanded by General Kutusoff, had reached Bavaria; but Mack's disaster rendered it impossible to defend the line of the Inn, and the last detachments of the Allies disappeared as soon as Napoleon's vanguard approached the river. The French pushed forth in overpowering strength upon the capital. Kutusoff and the weakened Austrian army could neither defend Vienna nor meet the invader in the field. It was resolved to abandon the city, and to unite the retreating forces on the northern side of the Danube with a second Russian army now entering Moravia. On the 7th of November the Court quitted Vienna. Six days later the French entered the capital, and by an audacious stratagem of Murat's gained possession of the bridge connecting the city with the north bank of the Danube, at the moment when the Austrian gunners were about to blow it into the air. [116] The capture of this bridge deprived the allied army of the last object protecting it from Napoleon's pursuit. Vienna remained in the possession of the French. All the resources of a great capital were now added to the means of the conqueror; and Napoleon prepared to follow his retreating adversary beyond the Danube, and to annihilate him before he could reach his supports. [The Allies and Napoleon in Moravia, Nov.] The retreat of the Russian army into Moravia was conducted with great skill by General Kutusoff, who retorted upon Murat the stratagem practised at the bridge of Vienna, and by means of a pretended armistice effected his junction with the newly-arrived Russian corps between Olmütz and Brünn. Napoleon's anger at the escape of his prey was shown in the bitterness of his attacks upon Murat. The junction of the allied armies in Moravia had in fact most seriously altered the prospects of the war. For the first time since the opening of the campaign, the Allies had concentrated a force superior in numbers to anything that Napoleon could bring against it. It was impossible for Napoleon, while compelled to protect himself on the Italian side, to lead more than 70,000 men into Moravia. The Allies had now 80,000 in camp, with the prospect of receiving heavy reinforcements. The war, which lately seemed to be at its close, might now, in the hands of a skilful general, be but beginning. Although the lines of Napoleon's communication with France were well guarded, his position in the heart of Europe exposed him to many perils; the Archduke Charles had defeated Massena at Caldiero on the Adige, and was hastening northwards; above all, the army of Prussia was preparing to enter the field. Every mile that Napoleon advanced into Moravia increased the strain upon his resources; every day that postponed the decision of the campaign brought new strength to his enemies. Merely to keep the French in their camp until a Prussian force was ready to assail their communications seemed enough to ensure the