sentences:  After his death, an uprising was raised by a powerful nobleman from Knin – Domagoj, and his son Zdeslav was exiled with his brothers, Petar and Muncimir to Constantinople.Facing a number of naval threats by Saracens and Byzantine Empire, the Croatian Prince Domagoj (864–876) built up the Croatian navy again and helped the coalition of emperor Louis II and the Byzantine to conquer Bari in 871.During Domagoj's reign piracy was a common practice, and he forced the Venetians to start paying tribute for sailing near the eastern Adriatic coast.