 The latter's son Ja'far was instead a cruel and violent lord who expelled the Berbers from the island after an unsuccessful revolt against him.In 1019, another uprising in Palermo was successful, and Ja'far was exiled to Africa and replaced by his brother al-Akhal (1019–1037).With the support of the Fatimids, al-Akhal defeated two Byzantine expeditions in 1026 and 1031.