Key Facts
- Dates
- 18–19 June 1815
- French forces engaged
- ~33,000 (three corps)
- French commander
- Marshal Grouchy
- Prussian commander
- General Johann von Thielmann
- Strategic role
- Blocking action; kept French from Waterloo
Strategic Narrative Overview
On 18–19 June 1815, Grouchy's three French corps engaged the Prussian III Corps under General Thielmann at Wavre. Thielmann, with Carl von Clausewitz as his chief-of-staff, conducted a determined rearguard action along the Dyle River. While the fighting was fierce and the French ultimately pushed through, the engagement consumed critical time and manpower, preventing the 33,000 French troops from reaching the decisive Battle of Waterloo taking place simultaneously.
01 / The Origins
Following Napoleon's return during the Hundred Days, the French army sought to defeat the allied forces piecemeal before they could unite. After the Battle of Ligny on 16 June 1815, Napoleon dispatched Marshal Grouchy with a substantial force to pursue the retreating Prussian army and prevent it from reinforcing the Duke of Wellington's forces gathering near Waterloo.
03 / The Outcome
Although French forces eventually gained the upper hand at Wavre, the battle ended strategically as a Prussian success: the delay it imposed was decisive. News of Napoleon's catastrophic defeat at Waterloo reached Grouchy during the fighting, rendering his effort moot. He ordered a withdrawal, and Napoleon's empire collapsed. Wavre is recorded as the final major engagement of the Napoleonic Wars.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Marshal Emmanuel de Grouchy.
Side B
1 belligerent
General Johann von Thielmann, Carl von Clausewitz.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.