History of Sardinia
In the Early Middle Ages, through barbarian movements, the waning of the Byzantine Empire influence in the western Mediterranean and the Saracen raids, the island fell out of the sphere of influence of any higher government. This led to the birth of four kingdoms called "Judicates" (Latin: "Judicati"; Sardinian: "Judicados") in the 8th through 10th centuries. Falling under papal influence, Sardinia became the focus of the rivalry of Genoa and Pisa, the Judicates and the Crown of Aragon, which eventually subsumed the island as the Kingdom of Sardinia in 1324. The Kingdom was to last until 1718, when it was ceded to the Piedmontese House of Savoy; later, in 1861, it would thus become the Kingdom of Italy and finally in 1946 the Italian Republic.
History of Sardinia
In 240 BC, in the course of the First Punic War, the Carthaginian mercenaries on the island revolted and gave the Romans, who some years earlier had defeated the Carthaginians in the naval battle of Sulci, the opportunity to land on Sardinia and occupy it. In 238 BC the Romans took over the whole island, without meeting any resistance. They took over an existing developed infrastructure and urbanized culture (at least in the plains). Along with Corsica it formed the province of Corsica et Sardinia, under a praetor. Together with Sicily it formed one of the main granaries of Rome until the Romans conquered Egypt in the 1st century BC.