Tatars and Mongols

The Cuman element in Bulgarian political and military life preceded the Mongol conquest by several generations. The uprising begun in 1186 by the brothers Peter and Asen, which restored an independent Bulgarian state after Byzantine rule dating from Basil II's conquest in 1018, was a Bulgarian-Vlach-Cuman enterprise rather than the work of a single ethnic community. The rebels created a state that called itself Bulgaria, used Slavonic in its documents and restored the Bulgarian Church, but its success depended heavily on Cuman cavalry. Cumans supplied a key component of the insurgent army, offered refuge north of the Danube when Bulgarian leaders needed to withdraw and regroup, and enabled Peter and Asen to turn a regional revolt around Tarnovo into a durable imperial restoration. Their role should not be interpreted as evidence of a single, coherent Cuman policy: Cumans were distributed throughout Bulgaria and the steppe and frequently appeared on opposing sides in later conflicts. Nevertheless, their participation in 1186 established a lasting pattern in which steppe warriors entered Bulgarian service, settled in Bulgarian lands and were absorbed into the aristocratic and dynastic order.

These connections remained important under the first Asenids. Cumans repeatedly reinforced Bulgarian armies, supported John Asen II in the long struggle that culminated in his restoration in 1218 and became intertwined with noble families on both sides of the Danube. In the 1230s the Mongol advance into southern Russia transformed this relationship. Large numbers of Cumans, driven from their pastures, crossed the Danube; some settled in Bulgaria, others plundered their way into Thrace, and still others entered the Latin, Nicaean or Hungarian worlds. John III Vatatzes of Nicaea ultimately recruited and resettled many of them in Thrace and Anatolia, while John Asen II employed Cuman refugees in the Bulgarian-Latin attack on Tzurulum in 1237. The siege ended after an epidemic at Tarnovo killed the tsar's wife, his eldest son and the recently recognized Bulgarian patriarch, but the episode illustrates how Cuman manpower remained central to Balkan warfare immediately before Mongol power reached the lower Danube.

In 1238–1239 the Mongols destroyed the loosely integrated Cuman polity extending between the Volga and the Carpathians. Many Cumans remained in the steppe and were absorbed into the new Mongol or Tatar state, strengthening its armies; others fled to Hungary, Bulgaria, Nicaea and the Latin Empire. Bulgaria thereby lost a generally friendly and militarily valuable northern neighbor and acquired in its place a centralized, expansionist and initially hostile power. The asylum granted by Hungary to Cuman leaders helped provoke the great Mongol invasion of 1241, while John Asen II's reception of Russian princes and boyars fleeing the conquest similarly demonstrated Bulgaria's connections with the displaced elites of Rus'. Kiev fell on 6 December 1240, and in the spring of 1241 Batu's forces invaded Hungary. After defeating King Béla IV on the Sajó River on 11 April, they pursued him toward the Dalmatian coast and ravaged the lands through which they moved.

News of the death of the great khan Ögedei caused the Mongol armies to turn east in 1242. Their return route crossed Zeta, where Kotor, Svač and Drivast were plundered, then Serbia and finally Bulgaria. Bulgarian resistance was slight, and Batu's returning forces inflicted extensive damage, seized booty and prisoners and probably imposed the tribute that is securely attested as already existing in 1253. Because the Mongols were moving rapidly toward the steppe, they did not occupy Bulgarian territory or capture and retain its fortresses; nevertheless, the raid established a durable relationship of subordination. Bulgaria was more exposed than any other Balkan state because the Golden Horde now stood immediately beyond its Danubian frontier. It consequently suffered more raids, submitted earlier and remained tributary longer than its neighbors, while also absorbing a comparatively large number of Cuman and Tatar settlers. The asymmetry was made worse by the fact that Nicaea, Bulgaria's principal competitor in Thrace, escaped this particular assault and indirectly benefited when the Mongols devastated the Seljuk lands to its east.

The Mongol shock coincided with a dynastic and institutional crisis. John Asen II died in 1241, and the minority of his son Kaliman I exposed the fragility of a polity whose peripheral districts were often attached to Tarnovo through personal allegiance rather than durable administration. Regents quarreled, boyar factions competed and neighboring states seized territory. Kaliman died in 1246 and was succeeded by the approximately eight-year-old Michael Asen, prolonging minority government and aristocratic rivalry. By the later thirteenth century Bulgaria had lost extensive territories in Thrace, Macedonia and the northwest. Its rulers faced Byzantium to the south, Hungary around Vidin and the middle Danube, Serbia in the west and the Golden Horde in the north. The tribute imposed after 1242 thus became more than a financial burden: it was part of a geopolitical structure that constrained Bulgarian diplomacy and encouraged ambitious provincial magnates to seek foreign protection.

Under Constantine Tih, who became tsar in 1257, dependence on the Tatars was combined with an increasingly desperate struggle against Byzantium and Hungary. Byzantine campaigns in 1263 inflicted heavy damage and took fortresses in western Thrace and along the Black Sea, while Jacob Svetoslav in Vidin relied on Hungarian protection. Constantine therefore appealed to his Tatar overlord Berke for assistance against Michael VIII Palaiologos. The appeal coincided with a dispute over the deposed Seljuk sultan Izz al-Din, who had taken refuge in Byzantium, and with the wider rivalry between the Golden Horde and the Mongols of Iran. A Tatar campaign in the winter of 1264–1265 brought revenge and plunder but no lasting strategic recovery for Bulgaria: once their own objectives had been achieved, the Tatars withdrew, leaving the major fortresses seized by Byzantium in Byzantine hands. This demonstrated that Horde assistance could punish Bulgaria's enemies without necessarily advancing Bulgarian territorial aims.

Berke's death in 1265 changed the balance. His successor Mangu Timur could not exercise firm control over the Golden Horde's many tribal and regional groupings, and centrifugal forces strengthened throughout the steppe. In the western lands closest to Bulgaria, Nogaj, a powerful Chinggisid prince and a nephew of Berke, built a virtually independent dominion. Between 1265 and 1280 he was frequently preoccupied with steppe affairs, but even then his proximity made him more dangerous to Bulgaria than the legitimate khan farther east. Bulgaria continued to pay tribute to Mangu Timur, Nogaj's rival, and therefore received little protection from its immediate northern neighbor. When Constantine raided Thrace around 1271 after Michael VIII refused to surrender disputed towns, the Byzantines called upon Nogaj. Acting independently of Mangu Timur, Nogaj crossed the Danube and subjected Bulgaria to a massive plundering raid. Surrounded by Byzantine, Hungarian and Nogaj enemies, Constantine was forced to make peace with Byzantium, even though he subsequently joined Charles of Anjou's anti-Byzantine coalition in 1272 or 1273.

During the later years of Constantine Tih, Tatar raiding became relentless. Nogaj remained connected with Michael VIII, and Bulgaria's alignment with Charles of Anjou, its opposition to the union of the Churches and its hospitality toward Byzantine dissidents gave Constantinople reasons to encourage further attacks. Nogaj also had his own motive: booty was indispensable for rewarding followers and expanding his power. Constantine, paralyzed from the waist down after an injury, was increasingly unable to direct the defense. Communities near the Danube and along the raiding corridors had to organize locally, and the most successful leader to emerge was Ivailo, known to George Pachymeres as Lahana. Although conventionally described as a swineherd, Ivailo may have occupied a relatively substantial place within the rural economy, since ownership of a large herd could make a livestock keeper part of a district elite. He organized local fighting bands against the Tatars, repeatedly defeated raiders and turned military success into a mass political following.

Ivailo's movement became a direct challenge to the monarchy in 1277. After defeating and killing Constantine Tih, he married the tsar's widow Maria and entered Tarnovo in the spring of 1278. His regime, however, faced both internal aristocratic opposition and a coordinated Byzantine-Tatar intervention. Michael VIII promoted John Asen III as a rival ruler, while a Nogaj force under Kasim Beg joined the Byzantine army that besieged Tarnovo in the autumn of 1278. Tatars simultaneously plundered the vicinity of the capital. Ivailo slipped out of the city, mobilized fresh forces and campaigned against them, continuing the anti-Tatar warfare on which his reputation rested. He then defeated two Byzantine armies sent to support John Asen III: one, reportedly 10,000 strong, on 17 June 1279, and another of 5,000 men at Sredna Gora on 5 August. These victories frustrated the Byzantine attempt to master Bulgaria, but they could not overcome the fragmentation of the country or the hostility of the leading Tarnovo boyars.

John Asen III fled Tarnovo late in 1279, and the boyars elected the influential George I Terter as tsar while Ivailo was still in the field. Ivailo and Kasim Beg crossed the Danube to seek assistance from Nogaj, while Byzantium sent John Asen III to the same court with gifts. Nogaj delayed all the claimants and then, during a drunken banquet, ordered Ivailo and Kasim executed. In killing Ivailo he described him as an enemy of his Byzantine ally Michael VIII, treated in Byzantine diplomatic language as Nogaj's political father. John Asen III narrowly escaped the same fate and returned permanently to the Byzantine aristocracy. Ivailo's death removed the most successful organizer of indigenous resistance to Tatar raiding, but it did not stabilize Bulgaria. It instead left George Terter to confront Nogaj without the military resources or territorial authority required for an independent policy.

George I Terter's accession inaugurated the rule of a Cuman-descended dynasty that occupied the Bulgarian throne in 1280–1292 and again in 1300–1322, approximately thirty-four years in total. The Terters had long been integrated into the Bulgarian aristocracy and were organically connected with the kingdom's political, ecclesiastical and cultural traditions; their Cuman ancestry did not make them foreign rulers. Yet George inherited a severely reduced state. Byzantium retained the southern Black Sea coast from Mesembria southward, western Thrace along the upper Maritsa and other former Bulgarian territories. Vidin, Braničevo and several central Bulgarian districts were effectively autonomous. Later descriptions show a Tarnovo tsardom surrounded by the Braničevo principality, the Vidin despotate, the Kopsis principality in the Sub-Balkan region and the Krăn despotate. The tsar of Tarnovo increasingly appeared as first among equals, caught between an effort to restore central authority and boyars determined to preserve their appanages with Byzantine, Serbian, Hungarian or Tatar assistance.

After Mangu Timur's death in 1280 or 1281, Nogaj became for practical purposes the ruler of an independent western steppe state and at times a kingmaker within the Golden Horde. From about 1280 until his death in 1299 Bulgaria experienced the most intense period of Tatar intervention and plunder. Byzantine diplomacy exploited Nogaj's power during the crisis surrounding Charles of Anjou's projected attack on Constantinople. When an anti-Byzantine coalition threatened Thrace, Byzantium requested Nogaj's aid, and he sent a cavalry army reported as 40,000 strong. Its march devastated northeastern Bulgaria and paralyzed Bulgarian action. The Sicilian Vespers of 31 March 1282 destroyed Charles's plans, while Nogaj's horsemen were subsequently directed against Serbian expansion in Macedonia. They expelled Serbian forces temporarily and ravaged Serbia, although Stefan Dragutin's successors soon returned and established lasting control over Velbăzhd, Tetovo, Skopje, Pijanec and Ovče Pole. Nogaj's raids served whichever combination of Byzantine diplomacy, steppe politics and appetite for booty happened to prevail.

George initially remained exposed to these attacks. Nogaj continued to raid Bulgaria, nominally at Byzantine encouragement but increasingly for his own advantage, and in 1285 one raiding force passed through Bulgaria to plunder Byzantine Macedonia and Thrace, demonstrating the erosion of the Byzantine-Nogaj alliance. After an especially devastating invasion in 1285, George accepted Nogaj's suzerainty and agreed to pay tribute directly to him. This amounted to abandoning the previous allegiance to the central Golden Horde, which since Berke's death had been unable to protect Bulgaria from Nogaj. The settlement was sealed by dynastic and personal guarantees. George sent his daughter to become a wife of Nogaj's son Caka and delivered his son Theodore Svetoslav to Nogaj's court as a hostage. Theodore had already spent part of his youth with his mother in Constantinople as a consequence of George's earlier accommodation with John Asen III; after being returned when Andronikos II recognized George as Bulgarian ruler in 1284, he entered captivity again, this time among the Tatars.

Submission reduced the number of raids controlled by Nogaj but did not restore George's authority over the provinces. In the northwest, the Cuman-descended boyars Dărman and Kudelin had ruled Braničevo from the fortress of Ždrelo since Bulgarian authority was restored there in 1273. Although connected in some fashion with Tarnovo, they behaved as self-ruling lords and defeated repeated Hungarian attacks between 1282 and 1284. When Stefan Dragutin, Hungary's client in Mačva, attacked in 1290, they defeated him and counterinvaded with Cuman and Tatar mercenaries, devastating Mačva as far as the Sava and sending raiders into southern Hungary. In 1291, however, Dragutin and his brother, King Stefan Uroš II Milutin, invaded together. Dărman and Kudelin were defeated and fled beyond the Danube to seek Nogaj's aid; Braničevo was annexed by Dragutin, while Tarnovo remained passive. The episode illustrates how Tatar patronage could sustain Bulgarian regional rulers but also isolate them from the central kingdom and accelerate the permanent detachment of Bulgarian-populated borderlands.

Nogaj also asserted suzerainty over Vidin, where Despot Shishman appears as his vassal in the early 1290s. The Shishman family, like the Terters, is presented in Bulgarian genealogical tradition as being of Cuman origin, although by this period it was fully incorporated into Bulgarian Orthodox and aristocratic society. The rise of these families reveals the depth of Cuman integration following more than a century of settlement, intermarriage and military service. Cuman ancestry could provide access to steppe networks without negating Bulgarian political identity. At the same time, Nogaj's protection enabled Shishman to resist Tarnovo and pursue an autonomous policy toward Serbia and Hungary. Other separatist domains appeared in central Bulgaria: Smilec established himself between Sredna Gora and the Balkan Mountains with Byzantine support, while George's brother Eltimir ruled west of Sliven in the Krăn region. Eltimir's territory may initially have remained a loyal Terter appanage, but the multiplication of such lordships showed how thoroughly central institutions had weakened.

In 1292 another major Tatar raid accompanied George I Terter's flight to Byzantium and Smilec's accession. Byzantine reluctance to receive George for fear of antagonizing Nogaj suggests that Nogaj engineered, or at least approved, the change, even though George had apparently been a compliant vassal and Theodore Svetoslav remained a hostage. Smilec's rule depended on a mixture of Nogaj influence, Byzantine family connections and regional aristocratic power. His marriage to a cousin of Andronikos II strengthened his ties to Constantinople, while members of his family held Sredna Gora. Near the end of his reign, part of the Krăn district was given as dowry to Eltimir, who married Smilec's daughter, producing the more clearly defined Krăn despotate. Bulgaria's political crisis thus drew in three principal external forces—the Golden Horde, Byzantium and Serbia—whose support allowed local rulers to consolidate territories at the expense of the unity of the kingdom.

The decisive change came from the steppe itself. Nogaj's conflict with the legitimate khan Tokta ended in Nogaj's defeat and death in 1299. His son Caka, accompanied by Theodore Svetoslav and supported by remnants of the Nogaj following, entered Bulgaria and briefly occupied the Tarnovo throne. Caka's position was precarious: he represented a defeated steppe dynasty, while Tokta was systematically eliminating Nogaj's adherents and reclaiming the western territories of the Horde. Theodore Svetoslav exploited this reversal. In 1300 he arrested and killed Caka, reportedly acting after consultation with or on the command of Tokta, and sent Caka's severed head to the khan. He then became tsar. His action ended the possibility that Bulgaria would become a political refuge and territorial base for Nogaj's house and removed the immediate mechanism through which the western Tatars had dictated changes of ruler in Tarnovo.

Theodore Svetoslav's accession therefore threw off Nogajid domination, though it did not necessarily mean the complete repudiation of Golden Horde suzerainty. Eastern testimony suggests that he promptly negotiated with Tokta, acknowledged him and probably accepted some form of tribute in return for peace. This was a far looser and more advantageous relationship than the direct intervention practiced by Nogaj. The Horde ceased interfering in Bulgarian succession and may even have supported Theodore's expansion. Internally, the new tsar acted with calculated severity to restore royal authority, punishing figures associated with earlier disasters and alleged treachery. He reconciled with his uncle Eltimir, who defeated, captured and blinded Radoslav, one of Smilec's brothers, when Radoslav invaded with Byzantine troops. Although Eltimir later maintained an autonomous and Byzantine-aligned position in Krăn, Theodore's early consolidation showed that a Tarnovo ruler could again discipline rival factions once direct Tatar coercion had disappeared.

Tokta rewarded the destruction of Caka, according to the Bulgarian narrative, by returning the region between the Danube mouths and the lower Dniester, centered on Belgorod or Akkerman, also known as Maurocastron and later Cetatea Albă. Scholarly reconstruction similarly concludes that by 1314 Theodore Svetoslav controlled southern Bessarabia as far as Akkerman, probably through a grant of former Nogaj territory rather than unilateral conquest. Tokta was then distributing conquered Nogaj lands to loyal followers, and Theodore would hardly have risked war by seizing them without agreement. The restored trans-Danubian territory had major political and economic value and enabled Bulgaria to recruit Tatar soldiers for its armies. When Caka's son Karakishik continued resistance against Tokta, he and his brothers fled in 1303 with approximately 3,000 horsemen to Shishman's Vidin principality. Their service greatly increased Vidin's capacity to oppose Serbian and Hungarian expansion, illustrating the transformation of Tatar forces from invaders into auxiliaries employed by Bulgarian rulers.

Theodore Svetoslav's accommodation with the Horde freed him to make Byzantium the principal focus of foreign policy. The Catalan presence in eastern Thrace between 1304 and 1307 distracted the empire and favored Bulgarian action. Theodore recovered Black Sea ports, expanded commerce and drew Venetian and Genoese shipping more deeply into Bulgaria's agricultural hinterland. Bulgarian exports consisted chiefly of agricultural products, while luxury goods entered through the maritime trade; the increased issue of Bulgarian coinage reflected this commercial revival. The region north of the Danube remained ethnically and politically mixed. The Arab geographer Abu al-Fida described Bulgarian and Tatar settlements between the Dnieper and the Danube mouths and identified Tarnovo as the city of the Bulgarians. Catholic organization likewise followed the commercial routes: in 1318 the diocese of Caffa was defined as extending from Varna to Sarai, revealing how Bulgarian, Italian, Orthodox, Catholic and Tatar spheres overlapped around the Black Sea.

The Golden Horde nevertheless retained the capacity to reverse Bulgarian gains. Tokta died in 1321 and was succeeded by Uzbek, who showed greater interest in the western steppe and the Danube mouths. Soon after his accession, he appears to have reclaimed the territory around the lower Dniester and between the Dniester and the Danube that had been granted to or held by Bulgaria. Between 1332 and 1337 the Tatars occupied Vicina, the important frontier and commercial center near the Danube delta. Yet fourteenth-century Horde overlordship was markedly looser than Nogaj's domination of the 1280s and 1290s. Bulgaria may often have benefited more than the Tatars from the relationship, gaining military recruits, diplomatic leverage and temporary access to trans-Danubian lands. Tatar detachments increasingly became instruments in Balkan diplomacy rather than forces able to determine the Bulgarian succession at will.

The weakening of direct Mongol control also formed part of the background to the rise of an autonomous Dobrudja polity. The northeastern Black Sea lands between the Danube mouths and Cape Emine had remained central to Bulgarian commerce and defense, but the political fragmentation of the fourteenth century encouraged regional rulers. In the mid-1340s Balik emerged as lord of Karvuna, a center generally associated with the coastal zone around modern Kavarna and Balchik. His brother and successor Dobrotica expanded this principality, intervened in Byzantine civil conflicts and acquired the title of despot. The polity later known as the Despotate of Dobrudja controlled ports and agricultural hinterlands coveted by Genoese and Venetian merchants and maneuvered among Tarnovo, Byzantium, the Horde and the maritime republics. Its emergence did not represent a revival of Nogaj's system; rather, it showed that the decline of concentrated Tatar power had opened space for a coastal Bulgarian principality whose strength rested on fortresses, commerce and naval connections.

Across the full period, Cuman and Tatar influence had contradictory effects. Cuman participation helped create the Second Bulgarian Empire, and Cuman-descended houses such as the Terters and Shishmans became fully Bulgarian dynasties. The Mongol conquest then destroyed the independent Cuman steppe order, imposed tribute on Bulgaria and supplied external support for separatist lords. Nogaj's ascendancy marked the nadir: raids devastated the countryside, emperors and kings used Tatar armies against one another, and Bulgarian rulers exchanged tribute, marriages and hostages for survival. Ivailo's victories represented the strongest popular and military resistance to this pressure, while George I Terter's submission demonstrated the limitations of a fragmented monarchy. Theodore Svetoslav's elimination of Caka in 1300 did not abolish every formal tie to the Horde, but it ended the most intrusive form of Tatar hegemony and allowed the crown to turn steppe power to its own purposes. Thereafter Mongol influence declined unevenly, surviving around Vicina and the Danube mouths but no longer monopolizing Bulgarian politics as Serbia rose, Byzantium struggled through civil wars, Wallachia and Moldavia emerged north of the Danube and Dobrudja developed under Balik and Dobrotica.