Robert I succeeded his elder brother Richard III as duke on 6 August 1027. The brothers had been at odds over the succession, and Richard's death was sudden. Robert was accused by some writers of killing Richard, a plausible but now unprovable charge. Conditions in Normandy were unsettled, as noble families despoiled the Church and Alan III of Brittany waged war against the duchy, possibly in an attempt to take control. By 1031 Robert had gathered considerable support from noblemen, many of whom would become prominent during William's life. They included the duke's uncle Robert, the archbishop of Rouen, who had originally opposed the duke; Osbern, a nephew of Gunnor the wife of Richard I; and Gilbert of Brionne, a grandson of Richard I. After his accession, Robert continued Norman support for the English princes Edward and Alfred, who were still in exile in northern France.