The Treaty of Turin concluded on 24 March 1860 between the Kingdom of Sardinia and Napoleon III's France called for the annexation of the County of Nice to France, subject to a plebiscite, as a reward for French assistance in Italy's war against Austria. The plebiscite, with universal adult male suffrage, was held on 15 and 16 April 1860, and resulted in an overwhelming vote in favour of annexation (833 for versus 54 against in Menton and Roquebrune), despite complaints of rigged elections from, among others, Nice-born Italian nationalist Giuseppe Garibaldi. The county of Nice was thus annexed to France that June, and Napoleon III paid 4 million francs in compensation to the prince of Monaco, who renounced his rights in perpetuity on 2 February 1861.