Representatives of the UK's armed forces and all countries involved in the battle were in attendance, as well as descendants of men who fought in it.
The battle at Waterloo cost thousands of British and allied lives in the defeat of Napoleon's forces.
Nearly 180,000 men fought for more than 10 hours, with more than 35,000 horses and some 500 cannon on the two sides.
Waterloo: The day that decided Europe's fate
- The Battle of Waterloo on 18 June 1815 saw the defeat of Napoleon Bonaparte by the Duke of Wellington
- Both men were 46, with formidable military reputations when they faced off on the battlefield
- The battle started at 11:00 and ended by 20:30, with about 47,000 casualties
- The decisive factor was the arrival of Prussian forces from the east, leading to Wellington's historic victory
- A defeated Napoleon was exiled to the island of Saint Helena, where he died in 1821