In 1848, the Kingdom of Piedmont-Sardinia embraced the goal of unification and attacked Austria, but was defeated. Cavour, the first prime minister of Piedmont-Sardinia joined the Crimean War in 1855, which inclined those countries favorably towards Italian unification. In 1859, Piedmont-Sardinia and France defeated Austria, and Piedmontese rule was extended to Northern Italy, two other important revolutionaries fighting for Italian unification were Giuseppe Mazzini, who founded the Young Italy movement in 1831, and Giuseppe Garibaldi, who conquered the Kingdom of Two Sicilies (Southern Italy) in 1860 and united it with the rest of the country.