Kingdom of Sicily, then (after that island was traded to Austria for Sardinia) the Kingdom of Sardinia from 1720. While the heads of the House of Savoy were known as the Kings of Sardinia, Turin remained their capital. French Revolutionary Wars Savoy was occupied by French revolutionary forces between 1792 and 1815. The entire region was first created to form the département of Mont-Blanc. In 1798, it was then divided between the departments of Mont-Blanc and Léman (French name of Lake Geneva). In 1801, Savoy officially left the Holy Roman Empire. On 13 September 1793 the combined forces of Savoy, Piedmont and Aosta Valley fought against and lost to the occupying French forces at the Battle of Méribel (Sallanches). Two-thirds of Savoy was restored to the Kingdom of Sardinia in the First Restoration of 1814 following Napoleon's abdication; approximately one-third of Savoy, including the two most important cities of Chambéry and Annecy, remained in France. Following Napoleon's brief return to power during the Hundred Days and subsequent defeat at Waterloo, the remaining one-third of Savoy was restored to the Kingdom of Sardinia at the Congress of Vienna to strengthen Sardinia as a buffer state on France's southeastern border. Modern history Annexation to France The French Second Republic first attempted to annex Savoy in 1848. A corps of 1,500 was dispatched from Lyon and invaded Savoy on 3 April, occupying Chambéry (capital city) and proclaiming the annexation to France. On learning about the invasion countrymen rushed to Chambéry. The corps were chased away by the local population. Five Frenchmen were killed and 800 captured. On 21 July 1858 in Plombières-les-Bains, Vosges, the prime minister of the Kingdom of Sardinia, Camillo Benso, Count of Cavour, met in secret with Napoleon III to secure French military support against the Austrian Empire during the conflicts associated with the Italian unification. During the discussion, Cavour promised that Sardinia would cede the County of Nice and Duchy of Savoy to the Second French Empire. Though this was a secret arrangement, it quickly became widely known. The treaty annexing Nice and Savoy to France was signed in Turin on 24 March 1860 (Treaty of Turin). In the northern provinces of the Chablais and Faucigny, there was some support for annexation to neighboring Switzerland, with which the northern provinces had longstanding economic ties. To help reduce the attractiveness of Switzerland, the French government conceded a free-trade Zone that