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.
Sardinia
The east Germanic tribe of the Vandals conquered Sardinia in 456. Their rule lasted for 78 years up to 534, when 400 eastern Roman troops led by Cyril, one of the officers of the "foederati", retook the island. It is known that the Vandal government continued the forms of the existing Roman Imperial structure. The governor of Sardinia continued to be called the "praeses" and apparently continued to manage military, judicial, and civil governmental functions via imperial procedures. The only Vandal governor of Sardinia about whom there is substantial record is the last, Godas, a Visigoth noble. In AD 530, a coup d'état in Carthage removed King Hilderic, a convert to Nicene Christianity, in favor of his cousin Gelimer, an Arian Christian like most of the élite in his kingdom. Godas was sent to take charge and ensure the loyalty of Sardinia. He did the exact opposite, declaring the island's independence from Carthage and opening negotiations with Emperor Justinian I, who had declared war on Hilderic's behalf. In AD 533 Gelimer sent the bulk of his army and navy (120 vessels and 5,000 men) to Sardinia to subdue Godas, with the catastrophic result that the Vandal Kingdom was overwhelmed when Justinian's own army under Belisarius arrived at Carthage in their absence. The Vandal Kingdom ended and Sardinia was returned to Roman rule.