Which leader's actions contributed to the unification of Italy in the 19th century?

Giuseppe Garibaldi was a key figure in the unification of Italy during the 19th century due to his military leadership and passionate dedication to the cause of Italian nationalism. As a leader of the Red Shirts, a volunteer army that fought for the unification of Italy, Garibaldi played a significant role in various military campaigns, most notably in the conquest of the Kingdom of the Two Sicilies. His successful military expeditions and ability to mobilize and inspire volunteers were crucial in bringing together the disparate Italian states into a unified nation. Garibaldi's vision for a united Italy resonated with many, making him a national hero and a symbol of the Risorgimento, the movement for Italian unification.

The other figures mentioned, while influential in European politics, did not focus on Italian unification to the same extent. Otto Von Bismarck, for example, was instrumental in the unification of Germany, while Victor Emmanuel II served as the king of a unified Italy but depended significantly on Garibaldi’s efforts. William I was a prominent leader in the German unification process, not Italy. Thus, Garibaldi's actions were directly connected to the successful unification of Italy, marking him as a pivotal leader in