A dense fog screened the moves of the assailants early on the morrow, and, after some confused but obstinate fighting, the French secured their hold on the plateau not only above the town of Jena, where their onset took the Prussians by surprise, but also above the Mühl-thal, where the enemy were in force.
By ten o'clock the fog lifted, and the warm rays of the autumn sun showed the dense masses of the French advancing towards the middle of the plateau. Hohenlohe now saw the full extent of his error and despatched an urgent message to Rüchel for aid. It was too late. The French centre, led by Lannes, began to push back the Prussian lines on the village named Vierzehn Heiligen. It was in vain that Hohenlohe's choice squadrons flung themselves on the serried masses in front: the artillery and musketry fire disordered them, while French dragoons were ready to profit by their confusion. The village was lost, then retaken by a rally of the Prussians, then lost again when Ney was reinforced; and when the full vigour of the French attack was developed by the advance of Soult and Augereau on either wing, Napoleon launched his reserves, his Guard, and Murat's squadrons on the disordered lines. The impact was irresistible, and Hohenlohe's force was swept away. Then it was that Rüchel's force drew near, and strove to stem the rout. Advancing steadily, as if on parade, his troops for a brief space held up the French onset; but neither the dash of the Prussian horse nor the bravery of the foot-soldiers could dam that mighty tide, which laid low the gallant leader and swept his lines away into the general wreck.[107]
In the headlong flight before Murat's horsemen, the fugitives fell in with another beaten array, that of Brunswick. At Jena the Prussians, if defeated, were not disgraced: before the first shot was fired their defeat was a mathematical certainty. At the crisis of the battle they had but 47,400 men at hand, while Napoleon then disposed of 83,600 combatants.[108] But at Auerstädt they were driven back and disgraced. There they had a decided superiority in numbers, having more than 35,000 of their choicest troops, while opposite to them stood only the 27,000 men of Davoust's corps.
Hitherto Davoust had been remarkable rather for his dog-like devotion to Napoleon than for any martial genius; and the brilliant Marmont had openly scoffed at his receiving the title of Marshal. But, under his quiet exterior and plodding habits, there lay concealed a variety of gifts which only needed a great occasion to shine forth and astonish the world.[109] The time was now at hand. Frederick William and Brunswick were marching from Auerstädt to make good their retreat on the Elbe, when their foremost horsemen, led by the gallant Blücher, saw a solid wall of French infantry loom through the morning fog. It was part of Davoust's corps, strongly posted in and around the village of Hassenhausen.
At once Blücher charged, only to be driven back with severe loss. Again he came on, this time supported by infantry and cannon: again he was repulsed; for Davoust, aided by the fog, had seized the neighbouring heights which commanded the high road, and held them with firm grip. Determined to brush aside or crush this stubborn foe, the Duke of Brunswick now led heavy masses along the narrow defile; but the steady fire of the French laid him low, with most of the officers; and as the Prussians fell back, Davoust swung forward his men to threaten their flanks. The King was dismayed at these repeated checks, and though the Prussian reserves under Kalckreuth could have been called up to overwhelm the hard-pressed French by the weight of numbers, yet he judged it better to draw off his men and fall back on Hohenlohe for support.
But what a support! Instead of an army, it was a terrified mob flying before Murat's sabres, that met them halfway between Auerstädt and Weimar. Threatened also by Bernadotte's corps on their left flank, the two Prussian armies now melted away in one indistinguishable torrent, that was stemmed only by the sheltering walls of Erfurt, Magdeburg, and of fortresses yet more remote.
Of the twin battles of Jena and Auerstädt, the latter was unquestionably the more glorious for the French arms. That Napoleon should have beaten an army of little more than half his numbers is in no way remarkable. What is strange is that so consummate a leader should have been entirely ignorant of the distribution of the enemy's forces, and should have left Davoust with only 27,000 men exposed to the attack of Brunswick with nearly 40,000.[110] In his bulletins, as in the "Relation Officielle," the Emperor sought to gloze over his error by magnifying Hohenlohe's corps into a great army and attenuating Davoust's splendid exploit, which in his private letters he warmly praised. The fact is, he had made all his dispositions in the belief that he had the main body of the Prussians before him at Jena.
That is why, on the afternoon of the 13th, he hastily sent to recall Murat's horse and Bernadotte's corps from Naumburg and its vicinity; and in consequence Bernadotte took no very active part in the fighting. For this he has been bitterly blamed, on the strength of an assertion that Napoleon during the night of the 13th-14th sent him an order to support Davoust. This order has never been produced, and it finds no place in the latest and fullest collection of French official despatches, which, however, contains some that fully exonerate Bernadotte.[111] Unfortunately for Bernadotte's fame, the tattle of memoir writers is more attractive and gains more currency than the prosaic facts of despatches.
Fortune plays an immense part in warfare; and never did she favour the Emperor more than on October the 14th, 1806. Fortune and the skill and bravery of Davoust and his corps turned what might have been an almost doubtful conflict into an overwhelming victory. Though Napoleon was as ignorant of the movements of Brunswick as he was of the flank march of Blücher at Waterloo, yet the enterprise and tenacity of Davoust and Lannes yielded him, on the Thuringian heights, a triumph scarcely paralleled in the annals of war. It is difficult to overpraise those Marshals for the energy with which they clung to the foe and brought on a battle under conditions highly favourable to the French: without their efforts, the Prussian army could never have been shattered on a single day.
The flood of invasion now roared down the Thuringian valleys and deluged the plains of Saxony and Brandenburg. Rivers and ramparts were alike helpless to stay that all-devouring tide. On October the 16th, 16,000 men surrendered at Erfurt to Murat: then, spurring eastward, le beau sabreur rushed on the wreck of Hohenlohe's force, and with the aid of Lannes' untiring corps compelled it to surrender at Prenzlau.[112] Blücher meanwhile stubbornly retreated to the north; but, with Murat, Soult, and Bernadotte dogging his steps, he finally threw himself into Lübeck, where, after a last desperate effort, he surrendered to overpowering numbers (November 7th).