Battle of Ligny and Battle of Quatre Bras, two days before the Battle of Waterloo.

The Battle of Ligny, in which French troops of the Armée du Nord under the command of Napoleon I defeated part of a Prussian army under Field Marshal Blücher, was fought on 16 June 1815 near Ligny in what is now Belgium. The result was a tactical victory for the French, but the bulk of the Prussian army survived the battle in good order, was reinforced by Prussian troops who had not fought at Ligny, and played a role two days later at the Battle of Waterloo. Ligny was the last victory in Napoleon's military career. In the culminating moment of this battle Blücher was wounded and carried off the battlefield, and was replaced by his chief of staff, Lieutenant General Gneisenau.

The Battle of Quatre Bras was fought on 16 June 1815, as a preliminary engagement to the decisive Battle of Waterloo that occurred two days later. The battle took place near the strategic crossroads of Quatre Bras and was contested between elements of the Duke of Wellington's Anglo-allied army and the left wing of Napoleon Bonaparte's French Armée du Nord under Marshal Michel Ney. The battle was a tactical victory for Wellington, but because Ney prevented him going to the aid of Blucher's Prussians who were fighting a larger French army under the command of Napoleon Bonaparte at Ligny it was a strategic victory for the French.

The Battle of Waterloo was fought on Sunday 18 June 1815, near Waterloo, marking the end of the Napoleonic Wars. The French Imperial Army under the command of Napoleon I was defeated by two armies of the Seventh Coalition. One was a British-led force with units from the United Kingdom, the Netherlands, Hanover, Brunswick, and Nassau, under the command of field marshal Arthur Wellesley, Duke of Wellington. The other comprised three corps of the Prussian army under Field Marshal Blücher. The battle was known contemporaneously as the Battle of Mont Saint-Jean in France and La Belle Alliance in Prussia.