Napoleon met his Waterloo at the Belgian village of Waterloo on this date in 1815.
The BBC has a concise history of the battle beginning with this introduction:
The Battle of Waterloo was fought thirteen kilometres south of Brussels between the French, under the command of Napoleon Bonaparte, and the Allied armies commanded by the Duke of Wellington from Britain and General Blücher from Prussia. The French defeat at Waterloo drew to a close 23 years of war beginning with the French Revolutionary wars in 1792 and continuing with the Napoleonic Wars from 1803. There was a brief eleven-month respite when Napoleon was forced to abdicate, exiled to the island of Elba. However, the unpopularity of Louis XVIII and the economic and social instability of France motivated him to return to Paris in March 1815. The Allies soon declared war once again. Napoleon’s final defeat at Waterloo marked the end of the Emperor’s final bid for power, the so-called ‘100 Days’, and the final chapter in his remarkable career.
Defeat at Waterloo ended Napoleon’s reign. He was exiled to the island of St. Helena where he died in 1821 at age 51.