Gebhard Leberecht von Blücher: Ligny, Waterloo & the Prussian March
Field Marshal Gebhard Leberecht von Blücher commanded the Prussian army whose arrival at Waterloo turned coalition intent into decisive battlefield pressure. He had been defeated at Ligny only two days earlier. The significance of his command lies in keeping that army coherent enough to recover, march and re-enter the campaign instead of withdrawing out of supporting distance.
A veteran of coalition war
Blücher had served through decades of European warfare and became one of Prussia’s most determined commanders against Napoleon. He was known for aggression and personal energy, while his chief of staff August Neidhardt von Gneisenau provided much of the staff method that helped convert intent into organised movement.
That partnership matters. Waterloo is often remembered through individual personalities, but Prussian recovery after Ligny depended on staff work, corps organisation, routes and the ability to move a battered army while maintaining contact with Wellington.
Ligny, 16 June 1815
Napoleon defeated the Prussians at Ligny and forced them from the battlefield. Blücher was unhorsed during the fighting and temporarily incapacitated. A defeated army could easily have withdrawn east toward its own supply lines and away from Wellington.
Instead, the Prussians fell back north toward Wavre. That direction kept them within operational reach of the Anglo-Allied army and preserved the possibility of mutual support.
The promise to Wellington
Wellington chose to stand at Mont-Saint-Jean because he expected Prussian assistance. Blücher committed to support him, but the promise still had to survive mud, exhaustion, damaged units, difficult roads and French pressure.
Prussian corps did not arrive as one perfectly timed mass. Bülow’s IV Corps led the movement toward Napoleon’s right, followed by further formations as the day developed.
18 June: pressure on Napoleon’s right
Prussian troops began to threaten the Plancenoit sector during the afternoon. Napoleon had to divert Lobau’s VI Corps and later elements of the Imperial Guard away from the main battle against Wellington.
That diversion was strategically important. The French army was now fighting two connected battles: break Wellington before the Anglo-Allied line collapsed, while simultaneously stopping the Prussians from rolling into the right and rear.
Later, Zieten’s I Corps moved toward Wellington’s left, strengthening the coalition line as the French position deteriorated.
Why Blücher matters
The cliché is that Blücher simply “arrived in time”. The better explanation is that his army remained a functioning strategic partner after defeat. Direction of withdrawal, staff coordination, corps movement and political commitment all mattered.
Waterloo was a coalition victory. Wellington’s defence created the time and fixed the French army; Blücher’s advance converted that time into additional combat power on Napoleon’s flank.
After Waterloo
Prussian forces took a leading role in the pursuit after the French collapse and advanced into France as the coalition brought the Hundred Days to an end.
Related: Battle of Waterloo field guide · Hundred Days campaign guide · Duke of Wellington biography
