The Battle of Montmirail (11 February 1814) was fought between a French force led by Emperor Napoleon and two Allied corps commanded by Fabian Wilhelm von Osten-Sacken and Ludwig Yorck von Wartenburg. In hard fighting that lasted until evening, French troops including the Imperial Guard defeated Sacken's Russian soldiers and compelled them to retreat to the north. Part of Yorck's Prussian I Corps tried to intervene in the struggle but it was also driven off. The battle occurred near Montmirail, France during the Six Days Campaign of the Napoleonic Wars. Montmirail is located 51 kilometres (32 mi) east of Meaux.