The individual known for his role in the unification of Italy in the 19th century is Giuseppe Garibaldi. A prominent military and political leader, Garibaldi was a key figure in the Italian unification movement, known as the Risorgimento. He led a series of military campaigns known as the Expedition of the Thousand in 1860, which resulted in the conquest of Sicily and Naples, furthering the cause of a unified Italy. Garibaldi's charismatic leadership and commitment to the nationalist cause made him a national hero, and his efforts contributed to the eventual proclamation of the Kingdom of Italy in 1861.