Was Napoleon's Battle of Trafalgar a success or failure?

The Battle of Trafalgar, fought on October 21, 1805, was a significant naval victory for the British fleet, led by Admiral Horatio Nelson, against the combined French and Spanish fleets. This battle marked a turning point in the Napoleonic Wars, as it ensured British naval supremacy and thwarted Napoleon's plans to invade Britain. Consequently, it is considered a failure for Napoleon, as it severely weakened his naval capabilities and shifted the balance of power at sea in favor of Britain.