He defeated Emperor Alexius I Comnenus at the Battle of Dyrrhachium in October 1081, and by February 1082 he had occupied Corfu and Durazzo.
Ia mengalahkan Kaisar Alexius I Komnenus di Pertempuran Dyrrhachium pada bulan Oktober 1081, dan pada bulan Februari 1082 dia menduduki Kerkyra dan Durazzo.