It was Christianized under Boris I, and many priests in this state were trained by St. Clement and St. Naum, though it was later the center of the Bogomil heresy.
An independence movement in this country was led by the Asen Brothers, and it defeated an invasion by Baldwin I under the leadership of Kaloyan. Impotent dynasties such as the Terter and Shishman ruled this state before it dissolved at the Battle of Velbuzhd. One leader of this state, Tervel, was an ally to Justinian II of Byzantium, but the skull of a later Byzantine emperor, Nicephorus I, was made into a silver-lined cup by this state's ruler Krum. It was Christianized under Boris I, and many priests in this state were trained by St. Clement and St. Naum, though it was later the center of the Bogomil heresy. An expedition sent by this place's Tsar Samuel came back with ninety- nine out of every hundred soldiers blinded, leading the Byzantine Emperor Basil II to become known as the "slayer" of this state's people. For 10 points, name this medieval kingdom, the ancestor of the modern-day state where Todor Zhivkov ruled from Sofia.
An independence movement in this country was led by the Asen Brothers, and it defeated an invasion by Baldwin I under the leadership of Kaloyan.
{Bulgaria} or the {Bulgar Khanate} or so forth