Following the victories of Piedmont-Sardinia and Garibaldi over the Kingdom of Naples, a popular plebiscite in the central and southern provinces of Italy to decide whether these areas should be taken into a united Italy "one and indivisible under Victor Emanuel, constitutional King." The vote took place in these provinces on October 21, 1860 with a resounding result in favor. (By John Osborne)
Source Citation
Sarah Wambaugh, A Monograph on Plebiscites, with a Collection of Official Documents (New York, Oxford University Press, 1920), 631.