The first French movements were to attack the Prussian flanks. Once in position, Marshal Ney attacked without orders. At first Ney's attack was successful, but he was soon cut off and under attack by the Prussians. Napoleon sent Marshal Lannes to help out. The French center was left weak, however, Napoleon deployed the Imperial Guard in the center and kept the Guard under his direct command. The rescue worked and Ney units were able to retreat. The Prussians did not take the initiative and attack. At 1 P.M. Napoleon made his move. The French flanks pushed hard against the Prussian flanks, and the French center attacked the Prussian center. The flank attacks worked and Prussians fled. They lost 10,000 men, 15,000 men were taken prisoner and 150 cannons were lost.