Napoleon had well estimated the forces of the enemy he was preparing to crush; he had concentrated under his hand a power superior to all the resources of the Prussians, whose soldiers were courageous and well disciplined, but for a long time little exercised in war. Napoleon's precautions were taken at every point of his vast territory; he had called new troops under his banners; everywhere he held in check his enemies, either secret or avowed. At one moment he thought of tendering his hand to Austria; he wrote to his ambassador at Vienna, M. de la Rochefoucauld: "My position and my forces are such that I have no cause to fear any one; but at length all these efforts are burdensome to my people. Of the three powers, Russia, Prussia, and Austria, I must have one for an ally. In any case one cannot rely on Prussia: there remains only Austria. The navy of France formerly flourished through the benefit resulting from an alliance with Austria. This power also feels the need of remaining quiet, a sentiment that I partake with all my heart. The house of Austria having often caused hints to be thrown out to me, the present moment, if it knows how to profit by it, is the most favorable."
Austria remained immovable, the uneasy spectator of the events that were preparing. The Russians had not quitted their positions on the Vistula; already the Prussians had invaded Saxony, compelling that little power to furnish them with an army of 20,000 men. The old Duke of Brunswick collected at the same time the contingent of the Elector of Hesse-Cassel, who had sought in vain to maintain his neutrality. The French army occupied Franconia; it was across these mountainous defiles that Napoleon had resolved to march against the enemy divided into two corps, under the orders of the Duke of Brunswick and the Prince of Hohenlohe. Already Marshals Davout and Bernadotte were established upon the left bank of the Saale. The troops of the Prince of Hohenlohe occupied the road from Weimar to Jena. Marshal Lannes had taken possession of the heights which commanded this last town. On the morning of the 14th October, the combat was opened against the corps of the Prince of Hohenlohe; superior in number to the troops employed by the Emperor Napoleon, but surprised by an attack of which they had not foreseen the vigor, the Prussian soldiers were soon thrown into a panic terror. The two wings of the French army, commanded by Soult and Augereau, already enveloped the enemy when Napoleon sent forward the guard and the reserves. The centre of the Prussian army fell back before this enormous mass; the retreat changed into a rout. At the same moment Marshal Biechel arrived by forced marches to the aid of the Prince of Hohenlohe; he brought 20,000 men, but in vain did he struggle to rally and curb the fugitives; he was drawn along and repulsed by the conquered as well as by the conquerors. French and Germans entered at the same time into Weimar; already the crowd of prisoners hindered the march of the victorious army.
At the same hour on the same day, with forces less considerable, Marshal Davout struggled alone, near Auerstadt, against the enemy's corps, commanded by the Duke of Brunswick and by King Frederick William. Marshal Bernadotte had quitted him, obeying literally the orders of the Emperor, who had enjoined him to occupy Hamburg, little careful, perhaps, of the danger to which he exposed his companion-in-arms. Davout cut the road of the Prussians in the defile of Koesen. The Duke of Brunswick, marching himself at the head of his troops, rushed upon him, violently attacking our immovable squares under a murderous fire. The old general fell, mortally wounded; the effort of Prince William and the king remained equally fruitless. Profiting by the trouble caused by his resistance, Davout threw his troops forward, and seized the heights of Eckartsberg; there, protected by his artillery, he could still defend his positions. The King of Prussia gave orders to retire on Weimar; he counted on joining the corps of the Prince of Hohenlohe, in order to renew the attack with all his forces. He had already travelled over half the distance without being harassed by Marshal Davout, whose troops were exhausted; but Bernadotte barred his passage; the confused waves of fugitives from Jena precipitated themselves into the ranks of their friends and compatriots. Behind them appeared the French soldiers, ardent in pursuit. The king turned off hastily, by way of Sommerda; the darkness was increasing, and the disorder increased with the darkness. In a single day the entire Prussian army was destroyed. "They can do nothing but gather up the débris," said Napoleon.
He took care to crush everywhere these sad remains of a generous and patriotic effort. Whilst his lieutenants were pursuing the wandering detachments of the Prussian army, the emperor imposed upon the nation he had just conquered a contribution of a hundred and fifty-nine millions. He sent the elector of Hesse to Metz, announcing in a letter to Marshal Mortier his intention that the house of Hesse should cease to reign, and would be effaced from the number of the powers. The Saxon prisoners, on the contrary, were sent back free to their sovereign. Everywhere the English merchandise found in the ports and warehouses was confiscated for the profit of the army. The Prussian commerce was ruined like the state.
Napoleon advanced upon Berlin; the King of Prussia sought to reach Magdeburg, constantly accompanied by the queen, whose warlike and patriotic ardor excited the rage and the insults of the emperor. "The Queen of Prussia has been many times in view of our posts," says the 8th bulletin of the grand army; "she is in continual fear and alarms. Last night she passed her regiment in review; she continually excited the king and the generals; she craves for blood. Blood the most precious has flowed; the most distinguished generals are those upon whom the first blows have fallen." Gross insinuations aggravated these rude allusions. "All the Prussians assign the misfortunes of Prussia to the journey of the Emperor Alexander. The change which has since then taken place in the spirit of the queen, who, from being a timid and modest woman, occupied with her home affairs, has become turbulent and warlike, is quite a sudden revolution. She desired all at once to have a regiment, to go to the Council, and she has led the monarchy so well that in a few days she has conducted it to the edge of a precipice."
A few battles finally opened everywhere the roads to the conqueror; Magdeburg was besieged, Erfurt had surrendered, Marshal Davout occupied Wittemberg, and Lannes occupied Dessau; Bernadotte had thrown himself against Halle, still defended by Prince Eugène of Wurtemberg. The resistance was severe; when the emperor came to visit the battle-field, he recognized among the corpses still scattered upon the ground the uniforms of the 32nd half-brigade. "Still the 32nd!" cried he. "I have had so many of them killed in Egypt, in Italy, everywhere, that there ought to be no more of them." It was with the same accent of indifferent and cold reflection that he was to say much later, in contemplating his sleeping son, "How long it takes to make a man! I have, however, seen fourteen of them cut off by a cannon-shot!"
Napoleon was at Potsdam, in the palace of the great Frederick, the military genius of this prince had for a long time excited his admiration. "At Potsdam has been found the sword of the great Frederick, the sash of a general, which he carried in the Seven Years' War, and his cordon of the Black Eagle," says the 19th bulletin.
The emperor seized upon these trophies with eagerness, and said, "I prefer these to twenty millions." Then, thinking a moment to whom he should confide this precious trust, "I will send it," said he, "to my old soldiers of the Hanoverian War; I will make a present of it to the governor of the Invalides; it shall remain at the Hotel."
On the 27th, for the first time in his life, Napoleon entered in triumph into an enemy's capital. For two days Berlin had been occupied by Marshal Davout. A gloomy sadness rested on all faces, but order was everywhere respected. The Prussian nation had valiantly defended itself, and there was no shame mingled with its sorrow. The dying Duke of Brunswick recommended his subjects to the emperor. The latter, in a passion, recalled bitterly to the old general the wild manifesto published in his name at the commencement of the French Revolution. "If I had the city of Brunswick demolished, and if I did not leave of it one stone on another, what would your prince say? Does not the law of retaliation permit me to do to Brunswick what he wanted to do to my capital? It is the Duke of Brunswick whom France and Prussia can accuse of being the sole cause of this war. Tell the general that he will be treated with all the respect due to a Prussian officer, but that in a Prussian general I cannot recognize a sovereign."
The same harshness characterized the reception by the emperor of the great Prussian nobles. "Do not come into my presence," said he to the Prince of Hatzfeld, who brought before him the civil magistrates of Berlin. "I have no need of your services; retire to your own estates." A letter from the prince to the King of Prussia, giving an account of the entry of the emperor, was intercepted. Napoleon saw treason in this communication, and a decree was immediately sent to Marshal Davout. "The Prince of Hatzfeld, who presented himself at the head of the deputation from Berlin, as entrusted with the civil government of this capital, and who, notwithstanding this office, and the duties which are attached to it, has made use of the knowledge which his position afforded him as to the situation of the French army, to convey intelligence respecting it to the enemy, will be tried before a military commission, in order to be judged as a traitor and a spy.