After their victory over Napoleon in the Battle of La Rothière on 1 February 1814, the two main Allied armies separated. Austrian Field Marshal Karl Philipp, Prince of Schwarzenberg's Army of Bohemia marched west toward Troyes while Blücher's Army of Silesia moved north to Châlons-sur Marne and turned west along the Marne River, aiming for Meaux. Leaving 39,000 troops to watch the cautious Schwarzenberg, Napoleon assembled a strike force of 20,000 infantry and 10,000 cavalry to deal with the more aggressive Blücher. By the evening of 8 February, the Army of Silesia was spread along a line of march long. Fabian Gottlieb von Osten-Sacken's 20,000 Russians led the column, followed by Ludwig Yorck von Wartenburg's 18,000 Prussians, Zakhar Dmitrievich Olsufiev's 4,000 Russians, Peter Mikhailovich Kaptzevich's Russians and Friedrich Graf Kleist von Nollendorf's Prussians, the last two forces totaling 15,000 men.