The historical figure best known for their role in the unification of Italy is Giuseppe Garibaldi. Active in the 19th century, Garibaldi was a military general and nationalist who played a crucial role in the Italian Risorgimento, the movement for Italy's unification. He led the campaign known as the Expedition of the Thousand in 1860, which resulted in the conquest of the Kingdom of the Two Sicilies and significant territory for Italy. Garibaldi’s efforts, along with those of other prominent figures, including Count Camillo di Cavour and King Victor Emmanuel II, ultimately led to the establishment of the Kingdom of Italy in 1861.