In December 1971, following an informative note from Ion Stănescu, the President of the Council of State Security of the Romanian Socialist Republic, to Yuri Andropov, the chief of KGB, Alexandru Usatiuc-Bulgăr as well as Valeriu Graur (n. December 1940, Reni), Alexandru Şoltoianu, and Gheorghe Ghimpu were arrested and later sentenced to long prison terms.
Since the comparative material attributable to the extinct members of Oghuric (Hunnic, Turkic Avar, Khazar and Bulgar) is scant, little is known about any precise interrelation of these languages and it is a matter of dispute whether Chuvash, the only "Lir"-type language with sufficient extant linguistic material, might be the daughter language of any of these or just a sister branch.
He also studied the old Bulgar inscriptions and concluded that the Bulgar language was still spoken in the beginning of the 9th century.
July 29 – Battle of Kleidion: Basil II inflicts not only a decisive defeat on the Bulgarian army, but his subsequent blinding of 15,000 prisoners reportedly causes Tsar Samuil of Bulgaria to die of shock, and earns Basil II the sobriquet 'Boulgaroktonos' (Bulgar-slayer).
Alcek (Bulgar: Altsikurs) was the leader of an Utigur Bulgar horde that settled in the villages of Gallo Matese, Sepino, Boiano and Isernia in the Matese mountains of central Italy.
Regular Russian incursions along the Volga, and internecine fights forced the Volga Bulgar kings to intermittently move their capital to Bilyar.
United under Kubrat of the Dulo clan (identical to the ruler mentioned by Persian chronicler Tabari under the name of Shahriar), the joined forces of the Utigur and Kutrigur Bulgars, and probably the Bulgar Onogurs, broke loose from the Turkic khanate in the 630s.
Later, an expanded Kimek Kaganate partially controlled the territories of the Oguz, Kangly, and Bagjanak tribes, and in the west bordered the Khazar and Bulgar territories.
Patria Onoguria, referred to as such by Agathius, Priscus Rhetor, Zacharias Rhetor, and Pseudo-Zecharias Rhetor, was a Hunno-Bulgar state around the Sea of Azov granted by Byzantium to the Onogurs in the 460s AD when, led by Attila's sons Dengizich and Ernakh, they overran Karadach's Akatziroi already settled in the region within the larger context of the Great Migrations and the Turkic expansion.
A group of youngsters visits historical ruins of the Bulgar city, the sacred place of their ancestors.
According to professor Nykola Mavrodinov (based on Vilhelm Thomsen), the script on vessel number 21 is in Bulgar, written with Greek letters, surrounding a cross, and reads, “Boyla Zoapan made this vessel. Butaul Zoapan intended it for drinking.”.