At what naval battle was Napoleon stopped from invading Great Britain?

The battle at which Napoleon was effectively stopped from invading Great Britain is the Battle of Trafalgar. Fought on October 21, 1805, Trafalgar was a significant naval engagement during the Napoleonic Wars between the British Royal Navy and the combined fleets of France and Spain.

Admiral Horatio Nelson led the British forces to a decisive victory, which established British naval supremacy for over a century. This victory was crucial for Great Britain, as it not only thwarted Napoleon's plans to invade the British Isles but also ensured that the British navy dominated the seas, allowing Britain to maintain its trade routes and exert influence globally.

Following Trafalgar, Napoleon recognized that he could not secure control over the English Channel, which was essential for any invasion of Britain. The defeat at this battle had lasting consequences on the military strategies of both Britain and France, highlighting the importance of naval power in determining the outcomes of conflicts during this era.