 In late 840 Rodulf was elected as archbishop of Bourges, Since Pippin led an expedition north against Charles' forces in Poitou in September, it generally thought that he was the driving force behind the election of Rodulf and that he successfully extended his authority into the Berri (the region around Bourges), which was as far north as it would ever go.One of Pippin's two surviving royal charters is a confirmation to the new archbishop.Yet if the appointment of Rodulf was political on the one hand, the capitulation ("capitula") which he signed upon his election "shows that [he] was in the vanguard of the Carolingian reform movement."