 Complete the following phrase:  On 9 February, Napoleon arrived at Sézanne with the Imperial Guard after a difficult march over muddy roads. French farmers brought their teams of horses to help pull the cannons through the quagmire. That day, Schwarzenberg asked Blücher to reinforce his right wing. Dutifully, the Prussian commander set out on 10 February with Kaptzevich and Kleist, moving southwest toward Sézanne. As the Allies marched, they heard the distant growl of cannons to their right. It was Napoleons army falling on Olsufievs outnumbered corps in the Battle of Champaubert. After an obstinate resistance, Olsufiev tried to break out to the east, but he was captured and his corps effectively destroyed. During the fighting, Olsufiev sent several messengers stating that he was under attack, but Blücher ignored them. The 1,500 Russian survivors of the debacle were organized into 34 combined battalions. This hard-luck outfit would suffer 600 casualties and lose all its remaining cannons at the 