Corsica and killings culminated in the assassination of Prefect Claude Érignac in 1998. In 2013, Corsica hosted the first three stages of the 100th Tour de France, which passed through the island for the first time in the event's 110-year history. Corsica was formed about 250 million years ago with the uplift of a granite backbone on the western side. About 50 million years ago sedimentary rock was pressed against this granite, forming the schists of the eastern side. It is the most mountainous island in the Mediterranean, a "mountain in the sea". It is also the fourth largest island in
Medieval Corsica of Massa, to put a stop to the turmoil. A Count of Cinarca was reinstated and the war between Malaspina, Cinarca, Pisa, and Genoa dragged on with no side gaining the mastery until 1298, when Pope Boniface VIII formally bestowed the "regnum Corsicae", Kingdom of Corsica, on James II of Aragon along with the "regnum Sardiniae", Kingdom of Sardinia. In 1325, James finally set out to conquer his dual island kingdom. Sardinia was attacked and the Pisans were destroyed. Unable to sustain themselves at sea, their fortunes in Corsica fell off abruptly. No comparable campaign, however, was launched at Corsica