Britannica Sources used in this answer

Why did Napoleon’s victory at Ligny not destroy the Prussian army?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Historical battle map showing troop positions at the Battle of Waterloo on June 18, 1815, near Brussels, Belgium. Red lines represent Anglo-Dutch infantry and cavalry under Wellington, positioned north of French forces. Blue lines show French infantry and cavalry under Napoleon, with both armies facing each other across a central road. Key locations like Chateau de Goumont (Hougoumont) and Plancenoit are labeled, and an inset map highlights the location within present-day Belgium and Europe. — Battle of Waterloo Battle of Waterloo, June 18, 1815.

Napoleon’s victory at the Battle of Ligny on June 16, 1815, failed to destroy the Prussian army primarily due to the onset of darkness and the stubborn resistance of the Prussian wings, which prevented the French from turning their success in the centre into a total rout.1

Several factors contributed to this outcome:

French Command Failures: Miscommunication between Napoleon and Marshal Michel Ney caused the corps under Jean-Baptiste Drouet to march pointlessly between battlefields, delaying the decisive blow against the Prussian centre.1
Prussian Resilience: Despite heavy casualties and the collapse of their line, the Prussian forces maintained their cohesion. Gebhard Leberecht von Blücher and his chief of staff, August, Count Neidhardt von Gneisenau, successfully coordinated a retreat toward Wavre, ensuring they remained a viable fighting force capable of supporting the Duke of Wellington at the Battle of Waterloo.12
Delayed Pursuit: Napoleon was slow to capitalize on his advantage, and the subsequent pursuit led by Marshal Emmanuel de Grouchy was dilatory, allowing the Prussians to regroup.1