Nothing, it is true, could be more admirably conceived and satisfactorily accomplished than the succession of grand manœuvres, which, distinguishing the opening of the campaign, had produced the great, yet cheaply-purchased success of Ulm, and the capture of Vienna. Nor was the series of combination less wonderful, by which, clearing the Vorarlberg, the Tyrol, and the north of Italy of the enemy, Napoleon had placed almost all the subordinate divisions of his own army at his disposal, ready to assist him in the grand enterprise against the Austro-Russian forces. But he has been considered by military critics as having trusted too great a risk upon the precarious event of battle, when he crossed the Danube, and plunged into Moravia, where a defeat, or even a check, might have been attended with the most fatal consequences. The position of the Archdukes Charles and John; the organisation of the Hungarian insurrection, which proceeded rapidly; the success of the Archduke Ferdinand, in raising a similar general levy in Bohemia, threatened alarming operations in the French rear; while Prussia, with the sword drawn in her hand, and the word _war_ upon her lips, watched but the slightest waning of Buonaparte's star, to pronounce the word, and to strike a blow at the same moment. Napoleon accordingly, though he had dared the risk, was perfectly sensible that as he had distinguished the earlier part of this campaign by some of the most brilliant manœuvres which military history records, it was now incumbent upon him, without delay, to conclude it by a great and decisive victory over a new and formidable enemy. He neglected, therefore, no art by which success could be ensured. In the first place, it was necessary to determine the allies to immediate battle; for, situated in the heart of an enemy's country, with insurrection spreading wide and wider around him, an immediate action was as desirable on his part, as delay would have been advantageous to his opponents. Some attempts at negotiation were made by the Austrians, to aid which Haugwitz, the Prussian minister, made his appearance in the French camp with the offer of his master's mediation, but with the alternative of declaring war in case it was refused. To temporize with Prussia was of the last consequence, and the French Emperor found a willing instrument in Haugwitz. "The French and Austrian outposts," said Napoleon, "are engaged; it is a prelude to the battle which I am about to fight--Say nothing of your errand to me at present--I wish to remain in ignorance of it. Return to Vienna, and wait the events of war."[151] Haugwitz, to use Napoleon's own expression, was no novice, and returned to Vienna without waiting for another hint; and doubtless the French Emperor was well pleased to be rid of his presence.[152]