The famous battle lost by Napoleon in 1815 was the Battle of Waterloo. This decisive conflict was fought on June 18, 1815, in modern-day Belgium against a coalition army led by the Duke of Wellington and Prussian Field Marshal Gebhard Leberecht von Blücher. The defeat of Napoleon at Waterloo marked the end of his Hundred Days return to power after his exile. Following this loss, he was exiled again to the remote island of Saint Helena in the South Atlantic, effectively ending his military and political career. The battle solidified Europe's political landscape and led to a period of relative peace.