In what year and name the battle did Britain become the supreme naval power in the world?

The Battle of Trafalgar, which took place in 1805, is recognized as a pivotal moment in naval history that established Britain as the supreme naval power in the world. During this battle, the British Royal Navy, led by Admiral Horatio Nelson, achieved a decisive victory against the combined fleets of France and Spain. This victory was crucial not just for the immediate military context but also for its long-term implications on naval dominance.

The triumph at Trafalgar eliminated the threat of French invasion and secured British control over the seas, facilitating unfettered trade and the expansion of the British Empire. The innovative tactics employed by Nelson during the battle, including breaking the enemy's line, showcased the effectiveness of British naval strategy. This battle effectively demonstrated Britain's superior naval capabilities and secured its hegemony over global maritime routes, marking a significant shift in naval power dynamics.