In the city-states of Italy, many argued for a unification of all the Italian kingdoms into a single nation. Obstacles to this included the many Italian dialects spoken by the people of Italy, and the Austrian presence in the north of the peninsula. Unification of the peninsula began in 1859. The powerful Kingdom of Sardinia (also called Savoy or Piedmont) formed an alliance with France and went to war with Austria in that year. The war ended with a Sardinian victory, and Austrian forces left Italy. Plebiscites were held in several cities, and the majority of people voted for union with Sardinia, creating the Kingdom of Italy under Victor Emmanuel II. In 1860, the Italian nationalist Garibaldi led revolutionaries in an overthrow of the government of the Kingdom of the Two Sicilies. A plebiscite held there resulted in a unification of that kingdom with Italy. Italian forces seized the eastern Papal States in 1861. In 1866 Venetia became part of Italy after Italy's ally, Prussia, defeated that kingdom's rulers, the Austrians, in the Austro-Prussian War. In 1870, Italian troops conquered the Papal States, completing unification. Pope Pius IX refused to recognize the Italian government or negotiate settlement for the loss of Church land.