Corse-du-Sud 's a French département. It's composed of the southern part of the island of Corsica. History The department was formed on September 15, 1975, when the Corse department was divided into Haute-Corse and Corse-du-Sud. Its boundaries correspond to the former department of Liamone, which existed from 1793 to 1811. Geography The department's surrounded on three sides by the Mediterranean Sea and on the north by the department of Haute-Corse. The entire island of Corsica's mount… (More on Corse-du-sud)