The Battle of Waterloo was fought on Sunday 18 June 1815, near Waterloo (at that time in the United Kingdom of the Netherlands, now in Belgium), marking the end of the Napoleonic Wars.
A French army under the command of Napoleon was defeated by two armies of the Seventh Coalition. One of these was a British-led force with units from the United Kingdom, the Netherlands, Hanover, Brunswick, and Nassau, under the command of the Duke of Wellington (often referred to as the Anglo-allied army or Wellington’s army).
The other comprised three corps (the 1st, 2nd and 4th corps) of the Prussian army under Field Marshal Blücher; a fourth corps (the 3rd) of this army fought at the Battle of Wavre on the same day. The battle was known contemporarily as the Battle of Mont Saint-Jean in France (after the hamlet of Mont-Saint-Jean) and La Belle Alliance in Prussia (“the Beautiful Alliance”; after the inn of La Belle Alliance).