 In 1858, they met at Plombières-les-Bains (in Lorraine), where they agreed that if the French were to help Piedmont combat Austria, which still reigned over the Kingdom of Lombardy-Venetia in northern Italy, France would be awarded Nice and Savoy.The Italo-French campaign against Austria in 1859 started successfully.However, sickened by the casualties of the war and worried about the mobilisation of Prussian troops, Napoleon III secretly made a treaty with Franz Joseph of Austria at Villafranca whereby Piedmont would only gain Lombardy.