 When Otto secured his control over Italy, Pietro was forced to change stance and to seek a rapprochement with Otto and his own opponents in Venice because he lost his anti-Otto supporters on the mainland and the Byzantines, who had supported resistance to Otto, were routed in Sicily in 965.Betrolini notes that it is difficult to ascertain which of the two interpretations is more likely due to uncertainties regarding the chronology of the main events (Pietro's attacks on the two towns, his marriage to Waldrada and Otto's pardon of Waldrada's father) and the identification of Vitale Candiano.Staley Edgcumbe had a different take regarding the repudiation of Giovanniccia.