The day was definitely decided by a magnificent cavalry charge led by Murat, which caused a rout that only ended at Weimar, the home of the immortal Goethe, six leagues away.
“The Emperor,” says Savary, “at the point where he stood, saw the flight of the Prussians, and our cavalry taking them by thousands. Night was approaching; and here, as at Austerlitz, he rode round the field of battle. He often alighted from his horse to give a little brandy to the wounded; and several times I observed him putting his hand into the breast of a soldier to ascertain whether his heart beat, because, in consequence of having seen some slight colour in his cheeks, he supposed he might not be dead. In this manner I saw him two or three times discover men who were still alive. On these occasions, he gave way to a joy it is impossible to describe.”
At the same time another battle had been fought and lost by the Prussians not more than twelve miles distant from the scene of this terrible carnage. Davout had received instructions to march to Jena by a route which would enable him to fall on the enemy’s rear while Napoleon was engaging them. In endeavouring to carry out this manœuvre the Marshal came directly upon Frederick’s army before Auerstädt. As regards material strength, the condition of things at Jena was completely reversed. Here, as we have seen, the Prussians were in the minority; at Auerstädt the French were very much weaker. Both sides fought well, and proved themselves worthy of their countrymen who were engaged in a similar struggle only a few leagues away, but when the survivors of the two Prussian armies met it was as fugitives with the common desire to put as great a distance between them and their pursuers as possible. The King, Prince Henry, Prince William, and Marshal Möllendorf were wounded, the Duke of Brunswick and General Schmettau died as a result of injuries they received, and despite the inability of Davout to continue the pursuit of the stricken enemy, the corpses of 20,000 Prussians covered the fields of Jena and Auerstädt, lay in ditches, or almost blocked the roads. Many guns and colours fell to the spoil of the victors. What would have happened had Bernadotte and his cavalry come up is too horrible to contemplate.