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.
History of Italy
Italy became a nation-state belatedly on 17 March 1861, when most of the states of the peninsula were united under king Victor Emmanuel II of the House of Savoy, which ruled over Piedmont. The architects of Italian unification were Camillo Benso, Count of Cavour, the Chief Minister of Victor Emmanuel, and Giuseppe Garibaldi, a general and national hero. In 1866, Prussian Prime Minister Otto von Bismarck offered Victor Emmanuel II an alliance with the Kingdom of Prussia in the Austro-Prussian War. In exchange Prussia would allow Italy to annex Austrian-controlled Venice. King Emmanuel agreed to the alliance and the Third Italian War of Independence began. The victory against Austria allowed Italy to annex Venice. The one major obstacle to Italian unity remained Rome.