Battle of Waterloo
From Tardis Wiki, the free Doctor Who reference
The battle of Waterloo took place in the Belgian province of Waterloo. It saw the defeat of Napoléon Bonaparte at the hands of the Duke of Wellington.
In a history project for school, Clyde Langer and Luke Smith were required to show the battle stratagies by Wellington and Napoleon at the battle. The pair re-enacted the battle on Mr Smith. (SJA: The Last Sontaran)
After the battle, Wellington told the Fourth Doctor, "'The only thing sadder than a battle lost, is a battle won." Some time later, the Doctor considered how right he was. (EDA: The Eight Doctors)