On 18 and 19 June 1815 the Battle of Wavre was fought here on the same day as the Battle of Waterloo. Napoleon had sent Marshal Grouchy to pursue part of the retreating Prussian army under the command of General Johann von Thielmann. Despite hearing the cannon sound from nearby Waterloo, Grouchy decided to obey his orders and engage the one Prussian Corps in Wavre. By the time Grouchy's battle was over, Napoleon had already lost at Waterloo.