Sicily
The Expedition of the Thousand led by Giuseppe Garibaldi captured Sicily in 1860, as part of the . The conquest started at Marsala, and native Sicilians joined him in the capture of the southern Italian peninsula. Garibaldi's march was completed with the Siege of Gaeta, where the final Bourbons were expelled and Garibaldi announced his dictatorship in the name of Victor Emmanuel II of Kingdom of Sardinia. Sicily became part of the Kingdom of Sardinia after a referendum where more than 75% of Sicily voted in favour of the annexation on 21 October 1860 (but not everyone was allowed to vote). As a result of the Kingdom of Italy proclamation, Sicily became part of the kingdom on 17 March 1861.
Norman conquest of southern Italy
Although the conquest of Sicily was primarily military, Robert and Roger also signed treaties with the Muslims to obtain land. Hindered by Sicily's hilly terrain and a relatively small army, the brothers sought influential, worn-down Muslim leaders to sign the treaties (offering peace and protection for land and titles). Because Sicily was conquered by a unified command, Roger's authority was not challenged by other conquerors and he maintained power over his Greek, Arab, Lombard and Norman subjects. Latin Christianity was introduced to the island, and its ecclesiastical organisation was overseen by Roger with papal approval. Sees were established at Palermo (with metropolitan authority), Syracuse and Agrigento. After its elevation to a Kingdom of Sicily in 1130, Sicily became the centre of Norman power with Palermo as capital. The Kingdom was created on Christmas Day, 1130, by Roger II of Sicily, with the agreement of Pope Innocent II, who united the lands Roger had inherited from his father Roger I of Sicily.
These areas included the Maltese Archipelago, which was conquered from the Arabs of the Emirates of Sicily; the Duchy of Apulia and the County of Sicily, which had belonged to his cousin William II, Duke of Apulia, until William's death in 1127; and the other Norman vassals.