While Napoleon defeated Gebhard Leberecht von Blücher's Army of Silesia in the Six Days Campaign, Karl Philipp, Prince of Schwarzenberg's Army of Bohemia forced its way across the Seine River. With the French forces falling back to the Yerres River, Napoleon sent MacDonald's XI Corps south to Guignes which it reached late on 14 February 1814. This was followed by a French victory in the Battle of Montereau on 18 February. At this time the 8,000-man XI Corps included the divisions of Michel Sylvestre Brayer, Joseph Jean Baptiste Albert and Amey. On 17–18 February Amey's division only included the 2nd Brigade which was made up of two battalions each of the 149th Line and Calvados National Guard and one battalion of the Manche National Guard. On 28 February, Napoleon ordered Amey's division withdrawn to Troyes to guard the army's wagon train and artillery parks. On 1 March the division counted only 772 infantry and a 70-man horse artillery company with four 8-pounders and one howitzer.