Khan Krum killed the Emperor Nicephorus and drank from his skull, but his successors almost converted to Catholicism and gradually adopted the language of their Slavic subjects.
One branch of this people carved the "horseman of Madara" and captured Greek masons to build a stone palace at Pliska. The other, the followers of Bayan, founded the fur-trading city of Suvar. Though they were subjugated by the Golden Horde, their descendants survive today as the Chuvash, Turkic-speakers of the Volga valley.  Khan Krum killed the Emperor Nicephorus and drank from his skull, but his successors almost converted to Catholicism and gradually adopted the language of their Slavic subjects. FTP, name this people famously slain by Emperor Basil II.
One branch of this people carved the "horseman of Madara" and captured Greek masons to build a stone palace at Pliska.
Bulgars (grudgingly accept: Bulgarians)