 In 829 the Bulgars imposed a local Slavic prince, Ratimir, as the new ruler of Pannonia.His province is believed to have been the territory of Roman Pannonia Savia.In 838, nine years later, following the Bulgar conquest of Macedonia, the Danubian count Radbod, prefect of the East March, deposed Ratimir and restored Frankish rule in Pannonia.