 Complete the following phrase:  Napoleon had no pontoon train, which slowed him down considerably. His army finally bridged the Marne at 2:00 am on 3 March, moving Louis Friants 1st Old Guard Division, the Imperial Guard cavalry, Emmanuel de Grouchys line cavalry and Neys corps to the north bank. Napoleon directed Victor and Arrighi to march to Château-Thierry. On 3 March, Marmont and Mortier crossed the Ourcq at La Ferté-Milon. Napoleons plan was to drive the Allies back towards Oulchy-le-Château. That day there was a skirmish at Neuilly-Saint-Front in which the French failed to trap the retreating Allies. Nevertheless, the French inflicted 500600 casualties on Bluchers army. During the day Blucher attempted to get in touch with Bülow and Wintzingerode who he hoped to join. He finally decided to withdraw behind the Aisne River. The next major engagement would be the 