Guiscard was succeeded by Roger Borsa, his son by Sichelgaita, as Bohemund, his son by an earlier wife Alberada De Macon (aka Alberada of Buonalbergo), was set aside. Guiscard left two younger sons: Guy of Hauteville and Robert Scalio, neither of whom made any trouble for their elder brothers. At his death Guiscard was duke of Apulia and Calabria, prince of Salerno, and suzerain of Sicily. His successes had been due not only to his great qualities but to the "entente" with the Papal See. He created and enforced a strong ducal power, which was nevertheless met by many baronial revolts, including one in 1078, when he demanded from the Apulian vassals an "aid" on the betrothal of his daughter. In conquering such wide territories he had little time to organize them internally. In the history of the Norman kingdom of Italy, Guiscard remains essentially the hero and founder, though his career ended in "something of a dead end," while his nephew Roger II was the statesman and organizer.