The Khazar Khaganate (650-969)

Around 650 AD, as the Western Turkic Khaganate disintegrated under pressure from Tang China and internal strife, the Khazars established themselves as an independent power across the grasslands between the Black Sea and the Caspian. The Khaganate's early capital was Balanjar in the Terek valley, and Khazar forces quickly subordinated neighboring steppe peoples, including elements of the Volga Bulgars and Slavic tribes who paid tribute to the Khagan. Byzantine chroniclers and imperial diplomacy treated the Khazars as a major regional power, and the dynasty's matrilineal Khaganate institution, in which a sacred Khagan ruled alongside a military Khagan Bek, became a defining feature of the state. Contemporary sources record Khazar pressure on the Byzantine Crimea and on the Arab frontier by the 650s. This consolidation made Khazaria the dominant force of the western steppe for the next three centuries.

Location: Pontic-Caspian Steppe

From the 650s the expanding Umayyad Caliphate and Khazaria fought a series of wars along the Caucasus that lasted for nearly a century and fixed the boundary between the Islamic world and the steppe. Khazar armies repeatedly raided into Azerbaijan and at one point threatened Mosul, while Arab commanders such as Maslama and later Marwan ibn Muhammad led large expeditions into Khazar territory. The climax came in 737, when Marwan's campaign penetrated deep into Khazaria, briefly forcing the Khagan to accept nominal conversion to Islam. That conversion did not endure, and the Khaganate recovered, reasserting control over its steppe realm and trade routes. Historians view the long standoff as a strategic limit on Arab expansion northward, analogous to the Frankish victory at Tours, and the Caucasus frontier remained the caliphate's northeastern edge for centuries.

Location: Caucasus frontier

Between roughly 740 and the mid-9th century the Khagan and the Khazar ruling class converted to Judaism, a notable step for a steppe empire positioned between the Christian Byzantine and Muslim Caliphate worlds. The evidence rests chiefly on the Khazar Correspondence of the 950s-960s, in which King Joseph of the Khazars told the Spanish Jewish statesman Hasdai ibn Shaprut of the conversion, and on parallel accounts by Arabic and Jewish writers. Historians debate the conversion's depth and date, with most concluding that the dynasty and a portion of the elite adopted Judaism while the wider population remained a mix of Turkic pagans, Muslims, Christians, and Jews. The conversion gave Khazaria a distinctive identity and made it a refuge and a subject of fascination for Jewish communities across the Mediterranean. No other major polity in medieval history was ruled on a comparable basis.

Location: Atil, Khazaria

By the mid-8th century the Khazar capital had moved to Atil in the Volga delta, a multilingual city of merchants whose customs and tolls funded the Khaganate. Atil stood at the junction of the Volga trade route, which carried furs, slaves, wax, and honey from the Baltic forests south to the Abbasid Caliphate and Byzantium, while Islamic silver dirhams flowed north in vast quantities. The city hosted Muslim, Jewish, Christian, and pagan communities, each with its own courts, and Khazar tribute collection from the Slavic and Volga Bulgar tribes was a core instrument of state power. Archaeology confirms Atil's location near the Caspian, with excavations underway at the Samosdelka site. The Khaganate's toll network made it the indispensable middleman of Eurasian commerce for two centuries.

Location: Atil, Volga Delta

In the early 830s the Khaganate turned to its ally Byzantium for help against growing pressure from the Rus and the Magyars, and Emperor Theophilus sent the engineer Petronas to build the fortress of Sarkel on the lower Don in about 833. The fortress guarded the portage route between the Don and the Volga, the key link between the Black Sea and Caspian trade systems, and was garrisoned jointly. Khazar-Byzantine relations were unusually close for the period: two emperors, Justinian II and Leo IV, had Khazar wives, and Leo's mother was the Khazar princess Chichek. Byzantine missions also pursued Christianization efforts in Khazaria, such as the work later attributed to St. Cyril. Sarkel became the emblem of the khaganate's defensive strategy until its capture by the Rus in 965.

Location: Don River, Russia

Around 930 a document now known as the Kiev Letter, a deed of donation to a Kiev synagogue, recorded a community of Jewish residents in the city bearing Turkic Khazar names alongside Hebrew-script signatures. The letter, discovered and published by scholars in the 19th century, is among the oldest surviving documents from Kiev and shows Khazar Jewish merchants living and doing business far beyond the Khaganate's borders. Its text names the city with a mixed Slavic, Turkic, and Hebrew spelling, and the signatures include a Khazar official named Synior. Historians read the letter as evidence that Khazaria's commercial networks and its Jewish diaspora extended up the Dnieper into the heart of what was becoming Kievan Rus. It remains one of the most cited artifacts in the study of medieval Jewish and Eastern European history.

Location: Kiev, Ukraine

In the 950s Hasdai ibn Shaprut, a leading Jewish courtier in the caliphate of Córdoba, learned of a Jewish kingdom on the Volga and wrote to its ruler, King Joseph of the Khazars, asking about the conversion and the state of the realm. Joseph's reply, preserved in copies from the 11th century onward, describes the Khaganate's history, its judicial system of multiple faith communities, its wars, and the dynasty's descent from Jewish converts. The correspondence is the single most important primary source on Khazar Judaism and has been scrutinized by historians for its authenticity and accuracy, questions now largely resolved in favor of a genuine Khazar core with later scribal accretions. Hasdai's letter also documents how news of Khazaria circulated through the Jewish trading networks of the Mediterranean. The exchange is a unique surviving dialogue between two Jewish communities separated by 4,000 kilometers.

Location: Córdoba, Spain / Atil, Khazaria

In 965 Prince Sviatoslav I of Kiev attacked the Khaganate's fortress of Sarkel, which fell to the Rus, and in 968 or 969 his forces descended the Volga and sacked the capital Atil, breaking the Khaganate's power permanently. The campaigns were part of Sviatoslav's wider sweep through the Volga Bulgars and Alans, and they shifted control of the Volga trade route to the Rus and their successors. Arabic sources such as Ibn Hawqal record that Khazar territory was left devastated and the Khagan took refuge, with remnants of the state surviving in scattered communities around the Caspian and Crimea for a time. The destruction ended more than three centuries of Khazar dominion over the western steppe and removed a major regional power between Byzantium and the caliphate. Kievan Rus and later the Cuman steppe powers inherited the Khazars' former sphere.

Location: Sarkel and Atil

After the khaganate's disappearance from the record, Khazaria became the subject of centuries of speculation, and in 1976 the writer Arthur Koestler published "The Thirteenth Tribe," arguing that Ashkenazi Jews were largely descended from Khazar converts rather than from ancient Israelite populations. The hypothesis had first been raised in the 19th century and was taken up by a range of writers for political purposes across the 20th century. Mainstream population genetics, including large-scale genome studies published from the 2000s onward, has found no evidence supporting Khazar origins for Ashkenazi Jews, and the hypothesis is rejected by historians of the region. Separate, better-documented threads of Khazar legacy include the Karaim and Krymchak communities of the Crimea and the incorporation of Khazar motifs into the founding narratives of several modern states. The scholarly debate over Khazaria's legacy continues, but the genetic hypothesis stands as a documented, debunked theory rather than a credible account.

Location: Global (historiography)