The Battle of Trafalgar saw the British decisively defeat a combined French and Spanish fleet on 21 October 1805 in the most significant naval battle of the Napoleonic Wars. A Royal Navy fleet of 27 ships of the line destroyed an allied French and Spanish fleet of 33 ships of the line west of Cape Trafalgar in south-west Spain. The French and Spanish lost 22 ships, while the British lost none. The British commander Admiral Lord Nelson died late in the battle, by which time he had ensured his place as Britain's greatest naval hero.
It was part of the War of the Third Coalition, and a pivotal naval battle of the 19th century. The British victory spectacularly confirmed the naval supremacy that Britain had established during the 18th century. However, by the time it was fought, Napoleon had abandoned his plans to invade southern England and instead was defeating Britain's allies in Germany.