The most famous member of Young Italy was the revolutionary and general Giuseppe Garibaldi, renowned for his extremely loyal followers, who led the Italian republican drive for unification in Southern Italy. However, the Northern Italy monarchy of the House of Savoy in the Kingdom of Sardinia, whose government was led by Camillo Benso, Count of Cavour, also had ambitions of establishing a united Italian state. In the context of the 1848 liberal revolutions that swept through Europe, an unsuccessful first war of independence was declared on Austria. In 1855, the Kingdom of Sardinia became an ally of Britain and France in the Crimean War, giving Cavour's diplomacy legitimacy in the eyes of the great powers. The Kingdom of Sardinia again attacked the Austrian Empire in the Second Italian War of Independence of 1859, with the aid of France, resulting in liberating Lombardy. On the basis of the Plombières Agreement, the Kingdom of Sardinia ceded Savoy and Nice to France, an event that caused the Niçard exodus, that was the emigration of a quarter of the Niçard Italians to Italy.