At the end of the day Napoleon still did not know what was going on. Instead of directing his corps commanders he took charge himself. He forgot to send orders to several of his corps. He thought he had defeated the entire Prussian army when in fact he had only partially defeated them. There was still a large Prussian army of about 100,000 who were not in the battle. Napoleon didn't think Davout had completely beaten the Prussians and said "tell your marshal he is seeing double", a reference to Davout's bad eyesight. Davout was made Duke of Auerstadt. The French Army marched into Berlin and then peace terms were signed between France and Prussia.