Bulgars expand into Macedonia
Plovdiv, BulgariaIn 836, following the expiration of the 20-year peace treaty between the Empire and Bulgaria, Theophilos ravaged the Bulgarian frontier. The Bulgarians retaliated, and under the leadership of Isbul they reached Adrianople. At this time, if not earlier, the Bulgarians annexed Philippopolis (Plovdiv) and its environs. Khan Malamir died in 836.