As a reward for capturing Rastislav, Carloman allowed Svatopluk to retain his principality, but the rest of Great Moravia was placed under the control of two Frankish lords, William and Engilschalk. Carloman's forces also captured Methodius, whom Pope Hadrian II had earlier appointed Archbishop of "Sirmium" with jurisdiction over the realms ruled by Rastislav and Svatopluk. Early in 871 Carloman also imprisoned Svatopluk on unspecified charges of disloyalty, which may have been connected to the rebellion of Carloman's younger brothers, Louis the Younger and Charles the Bald. Believing that Svatopluk was dead, the Moravians selected another member of their ruling family named Slavomír and made him their ruler.