For nearly three centuries the steppe frontier of Eastern Europe was subject to organised raiding for captives, conducted by the Crimean Khanate and the Nogai hordes and feeding a slave market centred on the Ottoman port of Kefe. Raiding parties, sometimes numbering tens of thousands of horsemen, struck deep into Muscovy, Ukraine, Podolia and Volhynia, burning settlements and driving off people and livestock; the great raid of 1571 reached and burned Moscow itself. The captives were marched to the Crimea, sold, and dispersed across the Ottoman world as domestic slaves, concubines, agricultural workers and galley rowers. Both Muscovy and the Polish-Lithuanian Commonwealth built defensive lines and raised dedicated ransom taxes, and the Cossack hosts emerged in part as a response. Estimates of the total taken run between about one and a half and three million; Kizilov's work shows how they are assembled from customs, ransom and market records and why they remain provisional. The traffic declined as Russian power advanced into the steppe and ended with the Russian annexation of the Crimea in 1783, outside this era.
The Crimean Khanate and allied Nogai hordes, as Ottoman vassals, raided Muscovy, the Polish-Lithuanian Commonwealth and the Ukrainian lands for captives who were sold through Crimean ports into the Ottoman world
There is no census. Standard reconstructions put Muscovy at roughly 6-7 million and the Polish-Lithuanian Commonwealth at 9-10 million around 1600, giving an order of magnitude of 16 million for the territories exposed to the raids. Estimates of captives taken between 1500 and 1700 range from about 1.5 million (Fisher) to 2-3 million (Kizilov and others), reconstructed from Ottoman customs registers at Kefe, ransom accounts and chronicle notices.
No total exists. Contemporary accounts describe killing during raids, the abandonment of the old and the very young who could not walk, and deaths on the march across the steppe to the Crimea; none of this was recorded systematically, and the estimates in circulation concern captives taken rather than people killed.
The seizure of women and children as the most valuable captives, their sale into domestic and sexual servitude and to the galleys, and the burning of settlements during raids are documented in the Ottoman, Crimean, Polish, Muscovite and Jewish ransom sources examined by Kizilov.
Russia, Ukraine, Bulgaria