Buonaparte has been much criticised by strategists for the rashness of thus passing the Danube into Moravia, while the Archduke Ferdinand was organising the Bohemians on his left, the Archdukes Charles and John in Hungary, with still formidable and daily increasing forces on his right, the population of Vienna and the surrounding territories ready to rise, in case of any disaster, in his rear; and Prussia as decidedly hostile in heart as she was wavering in policy. The French leader did not disguise from himself the risk of his adventure; but he considered it better to run all that risk, than to linger in Vienna until the armies in Hungary and Bohemia should have had time to reinforce the two emperors.

Napoleon's preparations were as follows:—his left, under Larmes, lay at Santon, a strongly fortified position: Soult commanded the right wing: the centre, under Bernadotte, had with them Murat and all the cavalry. Behind the line lay the reserve, consisting of 20,000, 10,000 of whom were of the Imperial guard, under Oudinot: and here Napoleon himself took his station. But besides these open demonstrations, Davoust, with a division of horse and another of foot, lay behind the convent of Raygern, considerably in the rear of the French right—being there placed by the Emperor, in consequence of a false movement, into which he, with a seer-like sagacity, foresaw the enemy might, in all likelihood, he tempted; and to which he lured them on accordingly by every engine of his craft.

Buonaparte, on learning that the Emperor Alexander was personally in the hostile camp, sent Savary to present his compliments to that sovereign; but really, as we may suppose, to observe as much as he could of the numbers and condition of the troops. Savary, on his return, informed his master that the Russian prince was surrounded by a set of young coxcombs, whose every look and gesture expressed overweening confidence in themselves and contempt for their opponents. All the reverses of the previous campaign were, as they took care to signify, the result of unpardonable cowardice among the Austrians, whose spirit had been quite broken by the wars in Italy: but they were the countrymen of the same Suwarrow who had beaten the French out of all Buonaparte's Lombard conquests, and the first general battle would show what sort of enemies the Russians were. How much of this statement is true we know not: it was openly made at the time in one of Buonaparte's bulletins—and, what is of more moment, he appears to have acted on the belief that Savary told the truth. Having, ere he received it, advanced several leagues beyond the chosen field of battle, near Austerlitz, he forthwith retreated on that position, with a studied semblance of confusion. The Czar sent a young aide-de-camp to return the compliment carried by Savary; and this messenger found the French soldiery actively engaged in fortifying their position—the very position which their Emperor had all along determined to occupy. The account of what the young Russian saw in the French lines gave, as Napoleon wished, a new stimulus to the presumption of his enemy; and, having made the preparations above described, he calmly expected the consequences of their rashness and inexperience.

On the 1st of December he beheld the commencement of those false movements which he had desired and anticipated. On seeing the Russians begin to descend from the heights, on which they might have lain in safety until the Archdukes could come to swell their array with the forces in Bohemia and Hungary, Napoleon did not repress his rapturous joy: "In twenty-four hours," said he, "that army is mine."

Shortly afterwards there arrived Count Haugwitz, an envoy from the King of Prussia, who being introduced into the Emperor's presence, signified that he was the bearer of an important communication. "Count," said Napoleon, "you may see that the outposts of the armies are almost meeting—there will be a battle to-morrow—return to Vienna, and deliver your message when it is over." The envoy did not require two biddings. Napoleon had all this year been protracting the indecision of the Prussian counsels by holding out the delusive hope, that, were Austria effectually humbled, the imperial crown of Germany might be transferred to the house of Brandenburg. The old jealousies, thus artfully awakened, had been sufficient to prevent a declaration of war from immediately following on the violation of the territory of Anspach and Bareuth. The intervention of the Czar had, it is not to be doubted, at length determined the Court of Berlin to close their unworthy neutrality:—but Haugwitz had no Prussian army in his train; and, seeing what was before him, he certainly did prudently to defer that which had been so unwisely as well as ungenerously put off from month to month, for one day more.

At one o'clock in the morning of the 2nd of December, Napoleon, having slept for an hour by a watch-fire, got on horseback, and proceeded to reconnoitre the front of his position. He wished to do so without being recognised, but the soldiery penetrated the secret, and, lighting great fires of straw all along the line, received him from post to post with shouts of enthusiasm. They reminded him that this was the anniversary of his coronation, and assured him they would celebrate the day in a manner worthy of its glory. "Only promise us," cried an old grenadier, "that you will keep yourself out of the fire." "I will do so," answered Napoleon, "I shall be with the reserve until you need us." This pledge, which so completely ascertains the mutual confidence of the leader and his soldiers, he repeated in a proclamation issued at daybreak. The sun rose with uncommon brilliancy: on many an after-day the French soldiery hailed a similar dawn with exultation as the sure omen of victory, and "the Sun of Austerlitz" has passed into a proverb.

The Russian General-in-Chief, Kutusoff, fell into the snare laid for him, and sent a large division of his army to turn the right of the French. The troops detached for this purpose met with unexpected resistance from Davoust, and were held in check at Raygern. Napoleon immediately seized the opportunity. They had left a deep gap in the line, and upon that space Soult forthwith poured a force, which entirely destroyed the communication between the Russian centre and left. The Czar perceived the fatal consequences of this movement, and his guards rushed to beat back Soult. It was on an eminence, called the hill of Pratzen, that the encounter took place. The Russians drove the French infantry before them: Napoleon ordered Bessieres to hurry with the imperial guard to their rescue. The Russians were in some disorder from the impatience of victory. They resisted sternly, but were finally broken, and fled. The Grand Duke Constantine, who had led them gallantly, escaped by the fleetness of his horse.

The French centre now advanced, and the charges of its cavalry under Murat were decisive. The Emperors of Russia and Germany beheld from the heights of Austerlitz the total ruin of their centre, as they had already of their left. Their right wing had hitherto contested well against all the impetuosity of Lannes: but Napoleon could now gather round them on all sides, and, his artillery plunging incessant fire on them from the heights, they at length found it impossible to hold their ground. They were forced down into a hollow, where some small frozen lakes offered the only means of escape from the closing cannonade. The French broke the ice about them by a storm of shot, and nearly 20,000 men died on the spot, some swept away by the artillery, the greater part drowned. Buonaparte, in his bulletin, compares the horrid spectacle of this ruin to the catastrophe of the Turks at Aboukir, when "the sea was covered with turbans." It was with great difficulty that the two emperors rallied some fragments of their armies around them, and effected their retreat. Twenty thousand prisoners, forty pieces of artillery, and all the standards of the imperial guard of Russia, remained with the conqueror. Such was the battle of Austerlitz;—or, as the French soldiery delighted to call it, "the battle of the emperors."

The Prussian envoy now returned, and presented to Napoleon his master's congratulations on the victory thus achieved. The Emperor whispered to Haugwitz, "Here is a message, of which circumstances have altered the address." Frederick-William, however, had 150,000 men under arms, and it by no means suited Napoleon's views to provoke him to extremities at this moment. He entered into a treaty with Haugwitz; and Prussia was bribed to remain quiescent, by a temptation which she wanted virtue to resist. The French Emperor offered her Hanover, provided she would oppose no obstacle to any other arrangements which he might find it necessary to form: and the house of Brandenburg did not blush to accept at his hands the paternal inheritance of the royal family of England.

The Austrian, understanding how Prussia was disposed of, perceived too clearly that further resistance was hopeless; and negotiations immediately begun.