sentences:  During his conflicts with Otto I of Germany, King Berengar II of Italy managed to make himself master of Corsica.In 962, Berengar was defeated and his son, Adalbert, fled to Corsica, whence he launched two separate attacks on Ottonian Italy, before going into exile in Burgundy.Following Otto II's reestablishment of imperial authority over Corsica, a period of political turmoil began, although the island remained subject to the margraves of Tuscany, who periodically made their power felt there.