In April 1064, Abelard joined three discontented barons (Geoffrey I of Conversano; Joscelin, Lord of Molfetta; and Robert, Count of Montescaglioso) in rebellion against Robert, who had just left for Sicily. They received the aid, financial and military, of Perenos, the Byzantine duke of Durazzo, and held out for several years, neither making headway against Robert nor he against them.
In April 1064, Abelard allied himself with three disgruntled barons (Geoffrey I of Conversano; Joscelin, Lord of Molfetta; and Robert, Count of Montescaglioso) in a revolt against Robert, who had just departed for Sicily. They received the assistance, financial and military, of Perenos, the Byzantine duke of Durazzo, and endured for several years, neither achieving success against Robert nor he against them.