Establishment and consolidation The Bulgars of
Asparuh moved westwards to what is now
Bessarabia, subdued the territories to the north of the Danube in modern
Romania, and established themselves in the
Danube Delta. In the 670s they crossed the Danube into
Scythia Minor, nominally a Byzantine province, whose steppe grasslands and pastures were important for the large herd stocks of the Bulgars in addition to the grazing grounds to the west of the
Dniester River already under their control. In 680 the Byzantine Emperor
Constantine IV (r.668–685), having recently
defeated the Arabs, led an expedition at the head of a huge army and fleet to drive off the Bulgars but suffered a disastrous defeat at the hands of Asparuh
at Onglos, a swampy region in or around the Danube Delta where the Bulgars had set a fortified camp. The Bulgars advanced south, crossed the
Balkan Mountains and invaded
Thrace. In 681, the Byzantines were compelled to sign a humiliating peace treaty, forcing them to acknowledge Bulgaria as an independent state, to cede the territories to the north of the Balkan Mountains and to pay an annual tribute. In his
universal chronicle the Western European author
Sigebert of Gembloux remarked that the Bulgarian state was established in 680. This was the first state that the empire recognised in the Balkans and the first time it legally surrendered claims to part of its Balkan dominions.
Vasil Zlatarski asserts that they concluded a treaty, but most historians agree that they were subjugated. The Bulgars were superior organisationally and militarily and came to politically dominate the new state, but there was cooperation between them and the Slavs for the protection of the country. The Slavs were allowed to retain their chiefs, to abide to their customs and in return they were to pay tribute in kind and to provide foot soldiers for the army. The
Seven Slavic tribes were relocated to the west to protect the frontier with the
Avar Khaganate, while the
Severi were resettled in the eastern Balkan Mountains to guard the passes to the Byzantine Empire. while
Steven Runciman considers that the tribe must have been of considerable dimensions. The Bulgars settled mainly in the north-east, establishing the capital at
Pliska, which was initially a colossal encampment of 23 km2 protected with earthen ramparts. In addition Tervel obtained the title
Caesar and, having been enthroned alongside the Emperor, received the obeisance of the citizenry of Constantinople and numerous gifts. Skirmishes continued until 716 when Khan Tervel signed an
important agreement with Byzantium that defined the borders and the Byzantine tribute, regulated trade relations and provided for the exchange of prisoners and fugitives. When the Arabs
laid siege to Constantinople in 717–718 Tervel dispatched his army to help the besieged city. In the decisive battle before the
Walls of Constantinople the Bulgarians slaughtered between 22,000 and 30,000
Arabs forcing them to abandon the undertaking. Most historians primarily attribute the Byzantine–Bulgarian victory with stopping the Arab offensives against
Europe. Zlatarski speculates that the old Bulgar military aristocracy was leaning towards war while other Bulgars supported by the majority of the Slavs were inclined for peace with Byzantium. The internal instability was used by the "soldier Emperor"
Constantine V (r.741–775), who launched nine major campaigns aiming to eliminate Bulgaria. Having contained the Arab threat during the first part of his reign, ConstantineV was able to concentrate his forces on Bulgaria after 755. He defeated the Bulgarians at
Marcellae in 756,
Anchialus in 763 and
Berzitia in 774, but lost the
Battle of the Rishki Pass in 759 in addition to hundreds of ships lost to storms in the Black Sea. The Byzantine military successes further exacerbated the crisis in Bulgaria, but also rallied together many different factions to resist the Byzantines, as shown at the council of 766 when the nobility and the "armed people" denounced Khan
Sabin with the words "Thanks to you, the Romans will enslave Bulgaria!". In 774 Khan
Telerig (r.768–777) tricked ConstantineV into revealing his spies at the Bulgarian court in Pliska and had them all executed. Despite being able to defeat the Bulgarians several times the Byzantines were able neither to conquer Bulgaria, nor to impose their suzerainty and a lasting peace, which is a testimony to the resilience, fighting skills and ideological coherence of the Bulgarian state. The devastation brought to the country by the nine campaigns of ConstantineV firmly rallied the Slavs behind the Bulgars and greatly increased the dislike of the Byzantines, turning Bulgaria into a hostile neighbour. As a result of the victory, the crisis was finally overcome, and Bulgaria entered the new century stable, stronger, and consolidated.
Territorial expansion During the reign of
Krum (r.803–814) Bulgaria doubled in size and expanded to the south, west and north, occupying the vast lands along the middle Danube, becoming
European medieval
great power during the 9th and 10th century along with the Byzantine and
Frankish Empires. Between 804 and 806 the Bulgarian armies thoroughly eliminated the Avar Khaganate, which had suffered a crippling blow by the Franks in 796, and a border with the
Frankish Empire was established along the middle
Danube or Tisza. In 808 they raided the valley of the
Struma River, defeating a Byzantine army, and in 809
captured the important city of Serdica (modern
Sofia). In 811 the Byzantine Emperor
Nicephorus I launched a massive offensive against Bulgaria and seized, plundered and burned down the capital Pliska, but on the way back the Byzantine army was decisively defeated in the
battle of the Varbitsa Pass. NicephorusI himself was slain along with most of his troops, and his skull was lined with silver and used as a drinking cup. Krum took the initiative and in 812 moved the war towards
Thrace, capturing the key Black Sea port of
Messembria and defeating the Byzantines once more
at Versinikia in 813 before proposing a generous peace settlement. However, during the negotiations the Byzantines attempted to assassinate Krum. In response, the Bulgarians pillaged Eastern Thrace and seized the important city of
Adrianople, resettling its 10,000 inhabitants in "
Bulgaria across the Danube". Krum made extensive preparations to capture Constantinople: 5,000 iron-plated wagons were built to carry the siege equipment; the Byzantines even pleaded for help from the Frankish Emperor
Louis the Pious. Due to the sudden death of Krum on 14 April 814, however, the campaign was never launched. To the west the Bulgarians were in control of
Belgrade (whose modern name was first known as
Alba Bulgarica) by the 820s, and the northwestern boundaries with the Frankish Empire were firmly settled along the middle Danube by 827. To the north-east Omurtag fought the Khazars along the
Dnieper River, which was the easternmost limit of Bulgaria. Extensive building was undertaken in the capital Pliska, including the construction of a magnificent palace, pagan temples, ruler's residence, fortress, citadel, water-main, and bath, mainly from stone and brick. In 814 Omurtag began the persecution of Christians, in particular against the Byzantine prisoners of war settled north of the Danube. The expansion to the south and south-west continued with Omurtag's successors under the guidance of the capable
kavhan (First Minister)
Isbul. During the short reign of Khan
Malamir (r.831–836), the important city of Philippopolis (
Plovdiv) was incorporated into the country. Under Khan
Presian (r.836–852), the Bulgarians took most of
Macedonia, and the borders of the country reached the
Adriatic Sea near
Valona and as far south as the Rhodopes and the plain surrounding Thessaloniki. Around August 863 there was a period of 40 days of earthquakes and there was a lean harvest, which caused famine throughout the country. To cap it all, there was an incursion of locusts. Yet, despite all the military setbacks and natural disasters, the skilful diplomacy of BorisI prevented any territorial losses and kept the realm intact. Taking this into account, as well as a variety of internal factors, BorisI converted to Christianity in 864, assuming the title
Knyaz (Prince). To check the possibility of Byzantine interference in the internal matters of Bulgaria, he sponsored the disciples of the brothers
Cyril and Methodius to create literature in
Old Bulgarian language. BorisI dealt ruthlessly with the opposition to the
Christianisation of Bulgaria, crushing a revolt of the nobility in 866 and overthrowing his own son
Vladimir (r.889–893) after he attempted to restore the traditional religion. In 893 he convened the
Council of Preslav where it was decided that the capital of Bulgaria was to be moved from Pliska to
Preslav, the Byzantine clergy was to be banished from the country and replaced with Bulgarian clerics, and Old Bulgarian language was to replace the Greek in liturgy. Bulgaria was to become the principal threat to the stability and security of the Byzantine Empire in the 10th century.
Golden Age The decisions of the Council of Preslav brought an end to the Byzantine hopes to exert influence over the newly Christianized country. In 894 the Byzantines moved the Bulgarian market from Constantinople to
Thessaloniki, affecting the commercial interests of Bulgaria and the principle of Byzantine–Bulgarian trade, regulated under the
Treaty of 716 and later agreements on the
most favoured nation basis. The new Prince,
Simeon I (r.893–927), who came to be known as Simeon the Great,
declared war and defeated the Byzantine army in Thrace. The Byzantines turned for aid to the
Magyars, who at the time inhabited the steppes to the north-east of Bulgaria. The Magyars scored two victories over the Bulgarians and pillaged
Dobrudzha, but SimeonI allied with the
Pechenegs further east, and in 895 the Bulgarian army inflicted a
crushing defeat on the Magyars in the steppes along the
Southern Bug River. At the same time, the Pechenegs advanced westwards and prevented the Magyars from returning to their homeland. The blow was so heavy that the Magyars were forced to migrate west, eventually settling in the
Pannonian Basin, where they eventually established the
Kingdom of Hungary. restored the status of Bulgaria as a most favoured nation, abolished the commercial restrictions and obliged the Byzantine Empire to pay annual tribute. The peace treaty remained in force until 912 although SimeonI did violate it following the
sack of Thessaloniki in 904, extracting further territorial concessions in
Macedonia. : The Morning Star of Slavonic Literature,
painting by Alfons Mucha In 913 the Byzantine emperor
Alexander provoked a
bitter war after resolving to discontinue paying an annual tribute to Bulgaria. However, the military and ideological initiative was held by SimeonI, who was seeking
casus belli to fulfil his ambition to be recognized as Emperor (in Bulgarian,
Tsar) and to conquer Constantinople, creating a joint Bulgarian–Roman state. In 917, the Bulgarian army dealt a crushing defeat to the Byzantines at the
Battle of Achelous, resulting in Bulgaria's total military supremacy in the Balkans. In the words of
Theophanes Continuatus "a bloodshed occurred, that had not happened in centuries", and
Leo the Deacon witnessed piles of bones of perished soldiers on the battlefield 50 years later. The Bulgarians built on their success with further victories at
Katasyrtai in 917,
Pegae in 921 and
Constantinople in 922. The Bulgarians also captured the important city of Adrianople in Thrace and seized the capital of the
Theme of Hellas,
Thebes, deep in southern Greece. Following the disaster at Achelous,
Byzantine diplomacy incited the Principality of Serbia to
attack Bulgaria from the west, but this assault was easily contained. In 924, the Serbs ambushed and defeated a small Bulgarian army, provoking a major retaliatory campaign that ended with Bulgaria's annexation of Serbia at the end of that year. Further expansion in the Western Balkans was checked by King
Tomislav of Croatia, who was a Byzantine ally and
defeated a Bulgarian invasion in 926. SimeonI was aware that he needed naval support to conquer Constantinople and in 922 sent envoys to the
Fatimid caliph
Ubayd Allah al-Mahdi Billah in
Mahdia to negotiate the assistance of the powerful
Arab navy. The caliph sent representatives to Bulgaria to arrange an alliance, but his emissaries were captured en route by the Byzantines near the
Calabrian coast. The Byzantine Emperor
Romanos I Lekapenos managed to avert a Bulgarian–Arab alliance by showering the Arabs with generous gifts. The war dragged on until Simeon I's death in May 927. By then Bulgaria controlled almost all Byzantine possessions in the Balkans, but without a fleet it did not attempt to storm Constantinople. Both countries were exhausted by the huge military efforts that had taken a heavy toll on the population and economy. Simeon's successor
Peter I (r.927–969) negotiated a favourable
peace treaty. The Byzantines agreed to recognize him as Emperor of Bulgaria and the
Bulgarian Orthodox Church as an independent Patriarchate, as well as to pay an annual tribute. The peace was reinforced with a marriage between Peter and Romanos's granddaughter
Irene Lekapene. This agreement ushered in a period of 40 years of peaceful relations between the two powers. During the first years of his reign, Peter I faced revolts by two of his three brothers, John in 928 and
Michael in 930, but both were quelled. During most of his subsequent rule until 965, PeterI presided over a
Golden Age of the Bulgarian state in a period of political consolidation, economic expansion and cultural activity.
Decline and fall Despite the treaty and the largely peaceful era that followed, the strategic position of the Bulgarian Empire remained difficult. The country was surrounded by aggressive neighboursthe Magyars to the north-west, the Pechenegs and the growing power of
Kievan Rus' to the north-east, and the Byzantine Empire to the south. Bulgaria suffered several devastating Magyar raids between 934 and 965. The growing insecurity, as well as expanding influence of the landed nobility and the higher clergy at the expense of the personal privileges of the peasantry, led to the emergence of
Bogomilism, a
dualistic heretic
sect that in the subsequent centuries spread to the Byzantine Empire, northern Italy and southern France (cf.
Cathars). To the south, the Byzantine Empire reversed the course of the
Byzantine–Arab wars against the declining
Abbasid Caliphate and in 965 discontinued the payment of the tribute, leading to sharp deterioration in their relations. In 968 the Byzantines incited Kievan Rus' to
invade Bulgaria. In two years the Kievan Prince
Svyatoslav I defeated the Bulgarian army, captured Preslav and established his capital at the important Bulgarian city of
Preslavets (meaning "Little Preslav"). In this desperate situation the aging PeterI abdicated, leaving the crown to his son
Boris II (r.969–971), who had little choice but to cooperate with Svyatoslav. The unexpected success of the Rus' campaigns led to a confrontation with the Byzantine Empire. In the course of their campaign the Byzantines seized Preslav and detained BorisII. Initially JohnI Tzimiskes presented himself as a liberator, but BorisII was promptly forced to ritually abdicate in Constantinople. Although at the time the Byzantines controlled only the eastern regions of the country, Bulgaria was proclaimed a Byzantine province. dynasty of Tsar
Samuel (976–1018) The lands to the west of the
Iskar River remained free and the Bulgarians were able to regroup headed by the four
Cometopuli brothers. By 976, the youngest of them,
Samuel, concentrated all power in his hands following the death of his elder siblings. When in 976 the rightful heir to the throne, BorisII's brother
Roman (r.971–997), escaped from captivity in Constantinople, he was recognized as Emperor by Samuel, who remained the chief commander of the Bulgarian army. Peace was impossible; as a result of the symbolic ending of the Bulgarian Empire following BorisII's abdication, Roman, and later Samuel, were seen as rebels and the Byzantine Emperor was bound to enforce the imperial sovereignty over them. The Byzantine poet
John Geometres wrote of the defeat: in
Ohrid Immediately after the victory Samuel pushed east and recovered north-eastern Bulgaria, along with the old capitals, Pliska and Preslav. In the next ten years the Bulgarian armies expanded the country south annexing the whole of
Thessaly and
Epirus and plundering the
Peloponnese Peninsula. With the major Bulgarian military successes and the defection of a number of Byzantine officials to the Bulgarians, the prospect of the Byzantines losing all their Balkan themes was quite real. Threatened by an alliance between the Byzantines and the Serbian state of
Duklja, in 997 Samuel defeated and captured its Prince
Jovan Vladimir and took control of the Serb lands. In 997, following the death of Roman, the last heir of the
Krum's dynasty, Samuel was proclaimed Emperor of Bulgaria. He established friendly relations with
Stephen I of Hungary through a marriage between his son and heir
Gavril Radomir and Stephen's daughter, but eventually Gavril Radomir expelled his wife, and in 1004 Hungary participated with the Byzantine forces against Bulgaria. ;
below: the death of Samuel,
Manasses Chronicle After 1000 the tides of the war turned in favor of the Byzantines under the personal leadership of BasilII, who launched annual campaigns of methodical conquest of the Bulgarian cities and strongholds that were sometimes carried out in all twelve months of the year, instead of the usual short campaigning of the epoch with the troops returning home to winter. In 1001 they seized Pliska and Preslav in the east; in 1003 a major offensive along the Danube resulted in the fall of Vidin after an eight-month siege; and in 1004 BasilII defeated Samuel in the
battle of Skopje and took possession of the city. When the returning men arrived in Samuel's residence in
Prespa, the Bulgarian Emperor suffered a heart attack at the grisly sight and died two days later, on 6 October. The Bulgarian aristocracy kept its privileges, although many noblemen were transferred to
Asia Minor, thus depriving the Bulgarians of their natural leaders. Although the Bulgarian Patriarchate was demoted to the
Archbishopric of Justiniana Prima and all Bulgaria (Archbishopric of Ohrid), it retained its sees and enjoyed a privileged autonomy. Despite several major attempts at restoring its independence, Bulgaria remained under Byzantine rule until the
brothers Asen and Peter liberated the country in 1185, establishing the
Second Bulgarian Empire. == Government ==