 In 1042, at the end of his 25-year rule, King Vojislav won a decisive battle near Bar against Byzantium, and Duklja became independent.Duklja's power and prosperity reached their zenith under King Vojislav's son, King Mihailo (1046–81), and his son King Bodin (1081–1101).From the 11th century, it started to be referred to as Zeta.