sentences:  By a peace treaty in 845, the Franks were confirmed as rulers over Slavonia, whilst Srijem remained under Bulgarian clientage.Later, the expanding power of Great Moravia also threatened Frankish control of the region.In an effort to halt their influence, the Franks sought alliance with the Magyars, and elevated the local Slavic leader Braslav in 892, as a more independent Duke over lower Pannonia.