Kingdom of Sardinia
On 17 March 1861, law no. 4671 of the Sardinian Parliament proclaimed the Kingdom of Italy, so ratifying the annexations of all other Apennine states, plus Sicily, to the Kingdom of Sardinia. The institutions and laws of the Kingdom were quickly extended to all of Italy, abolishing the administrations of the other regions. Piedmont became the most dominant and wealthiest region in Italy and the capital of Piedmont, Turin, remained the Italian capital until 1865, when the capital was moved to Florence. But many revolts exploded throughout the peninsula, especially in southern Italy, and on the island of Sicily, because of the perceived unfair treatment of the south by the Piedmontese ruling class. The House of Savoy ruled Italy until 1946 when Italy was declared a republic by referendum. In this referendum the southern regions, including Sardinia, voted overwhelmingly in favor of the House of Savoy, with the results being 63.8% in favor of maintaining the monarchy.
Kingdom of Italy
By 1943, Italy was failing on every front, by January of the year, half of the Italian forces serving on the Eastern Front had been destroyed, the African campaign had collapsed, the Balkans remained unstable and demoralised Italians wanted an end to the war. King Victor Emmanuel III urged Count Ciano to overstep Mussolini to try to begin talks with the Allies. In mid-1943, the Allies commenced an invasion of Sicily in an effort to knock Italy out of the war and establish a foothold in Europe. Allied troops landed in Sicily with little initial opposition from Italian forces. The situation changed as the Allies ran into German forces, who held out for some time before Sicily was taken over by the Allies. The invasion made Mussolini dependent on the German Armed Forces ("Wehrmacht") to protect his regime. The Allies steadily advanced through Italy with little opposition from demoralized Italian soldiers, while facing serious opposition from German forces.