We were not very far from the Prussians, whose king was at Erfurt. The queen was with him and rode up and down the ranks of the army on horseback, endeavouring to excite their ardour by her presence. Napoleon did not think that this was behaviour befitting a princess, and his bulletins made some wounding comments on the subject. The French and Prussian advance-guards met eventually, at Schleitz: where there took place, in view of the Emperor, a minor action in which the enemy were defeated; it was for them an ill-omened beginning.
That same day, Prince Louis, with a body of ten thousand men, found himself stationed in Saalfeld. This town is on the bank of the River Saale, in the middle of a plain which we could reach only by crossing some steep mountains. While Marshals Lannes' and Augereau's corps were moving toward Saalfeld through these mountains, Prince Louis, who had decided to await the French, should have occupied positions in this difficult country, full of narrow passes, where a few men could hold up a much greater number, but he failed to do this, probably because he was convinced that the Prussian soldiers were infinitely better than the French. He carried this scorn for all precautions so far as to place part of his force in front of a marshy stream, which would make their retreat very difficult in the event of a reverse. Old General Muller, a Swiss in the service of Prussia, whom the king had attached to his nephew as a steadying influence, made some observations which the prince took very badly, adding that there was no need to take precautions to beat the French, all that was needed was to fall on them the moment they appeared.
They appeared in the morning on the 10th; Marshal Lannes' corps leading and Marshal Augereau's behind him. This last did not arrive in time to take part in the action where, as it happened, their presence was not needed, for Marshal Lannes' troops were more than sufficient.
While waiting for his corps to emerge onto the plain, Marshal Augereau, accompanied by his staff, went up onto a little hill which overlooked the open country, from where we could follow all stages of the action.
Prince Louis could still have retreated to join the Prussian corps which occupied Jena; but having been the leading instigator of the war he perhaps felt he should not do so without a fight. He was most cruelly punished for his temerity. Marshal Lannes, making use of the heights, at the foot of which Prince Louis had imprudently deployed his troops, first raked them with grape-shot from his artillery, and when this had demoralised them, he advanced several masses of infantry, which descending rapidly from the high ground, swept like a torrent onto the Prussian battalions and instantly overwhelmed them! Prince Louis, aghast, and probably aware of his mistake, hoped to repair it by putting himself at the head of his cavalry and impetuously attacking the 9th and 10th Hussars. He had at first some success, but our Hussars having made a new and furious charge, drove the Prussians back into the marshes, while their infantry fled in disorder.
In the middle of the melee, Prince Louis found himself engaged with a sous-officier of the 10th Hussars named Guindet, who summoned him to surrender; the prince replied with a slash of his sword which cut the sous-officier's face, who thereupon ran the prince through and killed him.
After the fight and the complete rout of the enemy, the prince's body having been recognised, Marshal Lannes had it carried with honour to the chateau of Saalfeld, where it was handed to the princely family of that name, who were allied to the royal house of Prussia, and in whose residence the prince had spent the previous day and evening, looking forward to the coming of the French, and even, it is said, giving a ball for the local ladies. Now he was returned to them, vanquished and dead!… The next morning I saw the prince's body, laid out on a marble table, all traces of blood had been cleaned away, he was naked to the waist, still wearing his leather britches and his boots. He seemed to be asleep. He was a truly fine looking man, and I could not help indulging in some sad reflections on the uncertainty of human affairs, when I saw the remains of this young man, born on the steps of a throne, and, but lately, so loved, so courted and so powerful!
The news of the prince's death spread consternation in the enemy army, and also throughout Prussia, where he was highly popular.
7th Corps spent the day of the 11th at Saalfeld. On the 12th we went to Neustadt, and on the 13th to Kehla, where we encountered some remains of the Prussian troops defeated at Saalfeld. When Marshal Augereau attacked them, they put up little resistance and laid down their arms. Amongst those captured was the regiment of Prince Henry in which Augereau had once served as a soldier, and since, unless one was of high birth, it was very difficult to become a senior officer in the Prussian army, and as sergeants never became second lieutenants, his former company still had the same captain and the same sergeant-major. Placed by a quirk of fate in the presence of his one-time soldier, now a marshal, the Prussian captain, who remembered Augereau perfectly well, acted as a man of discretion and spoke always to the marshal as if he had never seen him before. Augereau invited him to dinner and seated him next to himself, then, learning that the officer's baggage had been seized, he lent him all the money he needed and gave him letters of introduction to take to France. What must have passed through the captain's mind! But nothing can describe the astonishment of the old Prussian sergeant-major at seeing his former soldier covered with decorations, surrounded by a numerous staff and in command of an army corps! All of which seemed like a dream! The marshal was more expansive toward this man than he had been toward the captain. Addressing the sergeant by name, he shook him by the hand, and arranged for him to be given twenty-five louis for himself and two for every soldier who had been in the ranks with him and was still there. We thought this behaviour was in the best of taste.
The marshal had expected to sleep at Kehla, which is only three leagues from Jena; but just as night was falling 7th Corps was ordered to go immediately to this last town which the Emperor had just entered, at the head of his guard and the troops of Marshal Lannes, without striking a blow.