Turkic migration . The original homeland of the early Bulgars is still unclear. Their homeland is believed to be situated in
Kazakhstan and the
North Caucasian steppes. Interaction with the Hunnic tribes, causing the migration, may have occurred there, but the
Pontic–Caspian steppe seems a more likely location. Some scholars propose that the Bulgars may have been a branch or offshoot of the Huns or at least Huns seem to have been absorbed by the Onogur-Bulgars after
Dengizich's death.
Hyun Jin Kim however, argues that the
Huns continued under Ernak, becoming the
Kutrigur and
Utigur Hunno-Bulgars. These conclusions remain a topic of ongoing debate and controversy among scholars. The first clear mention and evidence of the Bulgars was in 480, when they served as the allies of the Byzantine Emperor
Zeno (474–491) against the
Ostrogoths. Anachronistic references about them can also be found in the 7th-century geography work
Ashkharatsuyts by
Anania Shirakatsi, where the ''Kup'i Bulgar
, Duch'i Bulkar
, Olkhontor Błkar
and immigrant Ch'dar Bulkar
tribes are mentioned as being in the North Caucasian-Kuban steppes. An obscure reference to Ziezi ex quo Vulgares
, with Ziezi being an offspring of Biblical Shem, is in the Chronography of 354''. The Armenian history of
Movses Khorenatsi (5th century or later) speaks about two migrations of the Bulgars from the
Caucasus to
Armenia. The first migration is mentioned in association with the campaign of Armenian ruler
Valarshak to the lands "named
Basen by the ancients... and which were afterwards populated by immigrants of the Vlendur Bulgar Vund, after whose name they (the lands) were named
Vanand". Grigor Khalatians and
Josef Markwart connected the name
Vlendur with the
Olkhontor mentioned in the
Ashkharatsuyts, while Stepan Malkhasiants considered it a form of the Mongolian word
baghatur 'hero'. The second migration took place during the time of the ruler Arshak, when "great disturbances occurred in the range of the great Caucasus mountain, in the land of the Bulgars, many of whom migrated and came to our lands and settled south of Kokh". While Khorenatsi discusses these migrations in the context of the 2nd century BC, it has been suggested that Khorenatsi confused events from the second half of the 4th century AD with earlier occurrences; thus, the migration may have occurred during the reign of King
Arshak III of Armenia. The "disturbances" which caused them are believed to be the expansion of the Huns in the East European steppes. Dimitrov recorded that the toponyms of the Bolha and
Vorotan rivers, tributaries of the
Aras river, are known as
Bolgaru-chaj and
Vanand-chaj, and could confirm the Bulgar settlement of Armenia. Around 463 AD, the
Akatziroi and other tribes that had been part of the Hunnic union were attacked by the Šarağurs, one of the first Oğuric Turkic tribes that entered the
Ponto-Caspian steppes as the result of migrations set off in Inner Asia. According to
Priscus, in 463 the representatives of Šarağur, Oğur and Onoğur came to the Emperor in
Constantinople, and explained they had been driven out of their homeland by the
Sabirs, who had been attacked by the
Avars. This tangle of events indicates that the Oğuric tribes are related to the
Ting-ling and
Tiele people. It seems that Kutrigurs and Unigurs arrived with the initial waves of Oğuric peoples entering the Pontic steppes. The Bulgars were not mentioned in 463. The account by
Paul the Deacon in his
History of the Lombards (8th century) says that at the beginning of the 5th century in the North-Western slopes of the
Carpathians the
Vulgares killed the
Lombard king Agelmund. Avars or some Bulgar groups who were probably carried away by the Huns to the Central Europe. gaining great booty and confidence as they "became bolder in undertaking the toils of war." The defeated Bulgars then became subjects of the Lombards and later migrated in Italy with their king
Alboin. When the army of Ostrogoth chieftain
Theodoric Strabo grew to 30,000-men strong, it was felt as a menace to Byzantine
Emperor Zeno, who somehow managed to convince the Bulgars to attack the Thracian Goths. The Bulgars were eventually defeated by Strabo in 480/481. He founded the
Old Great Bulgaria (
Magna Bulgaria), also known as
Onoğundur–Bulğars state, or
Patria Onoguria in the
Ravenna Cosmography. According to Nikephoros I, Kubrat instructed his five sons to "never separate their place of dwelling from one another, so that by being in concordance with one another, their power might thrive". Subsequent events proved Old Great Bulgaria to be only a loose tribal union, as there emerged a rivalry between the
Khazars and the Bulgars over Turk patrimony and dominance in the Pontic–Caspian steppe. Some historians consider the war an extension of the Western Turks struggle, between the
Nushibi tribes and
Ashina clan, who led the Khazars, and the
Duolu/Tu-lu tribes, which some scholars associated with the
Dulo clan, from which Kubrat and many Bulgar rulers originated. The Khazars were ultimately victorious and parts of the Bulgar union broke up.
Subsequent migrations It is unclear whether the brothers' parting ways was caused by the internal conflicts or strong Khazar pressure. The latter is considered more likely. The Bulgars led by the first two brothers
Batbayan and
Kotrag remained in the Pontic steppe zone, where they were known as
Black Bulgars by Byzantine and Rus sources, and became Khazar vassals. The Bulgars led by Kotrag migrated to the middle
Volga region during the 7th and 9th centuries, where they founded
Volga Bulgaria, with
Bolghar as its capital. In 922 they accepted
Islam as the official religion. They preserved their national identity well into the 13th century by repelling the first
Mongol attacks in 1223. They were eventually subdued by the Mongols in 1237. They gradually lost their identity after 1431 when their towns and region were captured by the Russians. The third and most famous son,
Asparukh, according to Nikephoros I: Asparukh, according to the
Pseudo–Zacharias Rhetor, "fled from the Khazars out of the Bulgarian mountains". In the Khazar ruler Joseph's letter is recorded "in the country in which I live, there formerly lived the Vununtur (< Vunundur < Onoğundur). Our ancestors, the Khazars warred with them. The Vununtur were more numerous, as numerous as the sand by the sea, but they could not withstand the Khazars. They left their country and fled... until they reached the river called Duna (
Danube)". This migration and the foundation of the Danube Bulgaria (the
First Bulgarian Empire) is usually dated c. 681. The composition of the horde is unknown, and sources only mention tribal names Čakarar, Kubiar, Küriger, and clan names
Dulo,
Ukil/Vokil, Ermiyar, Ugain and Duar. The
Onglos where Bulgars settled is considered northern
Dobruja, secured to the West and North by Danube and its
Delta, and bounded to the East by the
Black Sea. They re-settled in North-Eastern Bulgaria, between
Shumen and
Varna, including
Ludogorie plateau and southern Dobruja. The distribution of pre-Christian burial assemblages in Bulgaria and Romania is considered as the indication of the confines of the Bulgar settlement.In the Balkans they merged with the Slavs and other autochthonous Romance and Greek speaking population, like the
Thracians and
Vlachs, becoming a political and military elite. However, the influence of the pre-Slavic population had relatively little influence on the Slavs and Bulgars, indicating their population was reduced in previous centuries. The hinterlands of the Byzantine territory were for years occupied by many groups of Slavs. According to Theophanes, the Bulgars subjugated the so-called
Seven Slavic tribes, of which the
Severians were re-settled from the pass of Beregaba or Veregava, most likely the
Rish Pass of the
Balkan Mountains, to the East, while the other six tribes to the Southern and Western regions as far the boundary with the Pannonian Avars. Scholars consider that the absence of any source recording the Slavic resistance to the invasion was because it was in their interest to be liberated from the Byzantine taxation. It is considered that the Slavic tribal organization was left intact, and paid tribute to the ruling Bulgars. According to Nikephoros I and Theophanes, an unnamed fourth brother, believed to be
Kuber, "having crossed the river Ister, resides in Pannonia, which is now under the sway of the Avars, having made an alliance with the local peoples". Kuber later led a revolt against the Avars and with his people moved as far as the region of
Thessaloniki in Greek
Macedonia. The fifth brother, reported by Nikephoros I and Theophanes, "settling in the five
Ravennate cities became a subject of the Romans". This brother is believed to be
Alcek, who after a stay in Avar territory left and settled in Italy, in
Sepino,
Bojano and
Isernia. These Bulgars preserved their speech and identity until the late 8th century. The First Bulgarian Empire (681–1018) had a significant political influence in the Balkans. In the time of
Tervel (700–721) the Bulgars helped Byzantines two times, in 705 the Emperor
Justinian II to regain his throne, and 717–718 defeating the Arabs during the siege of Constantinople.
Sevar (738–753) was the last ruler from the Dulo clan, and the period until c. 768–772 was characterized by the Byzantino-Bulgar conflict and internal crisis. In the short period followed seven rulers from the Uokil and Ugain clan.
Telerig (768–777) managed to establish a pacific policy with Byzantium, and restore imperial power. During the reign of
Krum (803–814), the Empire doubled its size, including new lands in Macedonia and
Serbia. He also successfully repelled the invading force of the Byzantines, as well defeated the Pannonian Avars where additionally extended the Empire size. In 865, during the reign of Khan
Boris I (852–889), the Bulgars accepted Christianity as the official religion, and Eastern Orthodoxy in 879. The greatest expansion of the Empire and prosperity during the time of
Simeon I (893–927) is considered as the Bulgarian
Golden Age. However, from the time of
Peter I (927–969) their power declined. The Hungarians,
Kievan Rus' Slavs, as well
Pechenegs and
Cumans held many raids into their territory, and so weakened were eventually conquered in 1018 by the Byzantine Empire. == Society ==