Napoléon a envoyé Grouchy pour poursuivre une partie de l'armée prussienne en retraite sous le commandement du général Johann von Thielmann. 17 June, Grouchy was unable to close with the Prussians. Despite hearing the cannon sound from the nearby Battle of Waterloo, he decided to follow the Prussians along the route literally specified in his orders, issued by Napoleon via Marshal Soult, while the Prussian and British-Dutch armies united to crush Napoleon.<unk> Despite hearing the cannon sound from the nearby Battle of Waterloo, he decided to follow the Prussians along the route literally specified in his orders, issued by Napoleon via Marshal Soult, while the Prussian and British-Dutch armies united to crush Napoleon. <unk> <unk> <unk>
Battle of Wavre, on 18<unk>19 June 1815, but it was then too late, as by the time this battle was over Napoleon had already lost at Waterloo.