The term 'Hero of Trafalgar Square' refers to the British naval commander Admiral Horatio NELSON, who is commemorated in the famous London landmark. NELSON was a national hero in Britain for his victory at the Battle of Trafalgar in 1805, where he led the Royal Navy to a decisive victory over the combined fleets of France and Spain. He was killed during the battle, but his legacy lives on in the form of the Trafalgar Square monument, which stands as a tribute to his bravery and leadership.