 He did not give Carloman the traditional prefect's seat at Tulln in Pannonia.Instead, according to the "Annales Fuldenses" (863), he was given the title "prefect of the Carantanians" ("praelatus Carantanis") and posted further south, in a more peripheral region, perhaps in a design to keep him from trying to seize power from his father.From 857 on Carloman and his brother were occasional witnesses to their father's charters.