For centuries the khanates of Khiva and Bukhara were the principal slave markets of Central Asia, supplied chiefly by Turkmen raiders of the Yomut and Tekke tribes who took captives from Shia Persian Khorasan - religious opinion in the Sunni khanates treating Shia Persians as lawfully enslavable - and also by raids on Russian settlements, shipping on the Caspian and caravans. Slaves worked as agricultural labourers on irrigated estates, as artisans and in households; the trade was central to the economies of the oasis khanates. Captured Russians became a recurring pretext for Russian intervention, from the disastrous Khivan expedition of 1839-40 to the conquest of 1873, when General Kaufman's forces occupied Khiva and the khan was compelled to abolish slavery; Russian officers recorded the emancipation of tens of thousands, most of them Persian. Bukhara's slavery was formally abolished in 1873 as well, and finally with the fall of the emirate in 1920. Cumulative totals across the early modern period are extrapolations from traveller and diplomatic accounts, not counts.
Turkmen and Kazakh raiders captured Persians, Russians and others for sale in the slave markets of Khiva and Bukhara
The captives were taken from Khorasan and the Persian plateau, Russian and Ukrainian frontier settlements, and neighbouring Central Asian peoples over some 370 years, with no continuous source population. The firmest numbers are terminal: Russian forces recorded roughly 40,000 slaves freed in Khiva at the 1873 conquest and comparable numbers in Bukhara, and nineteenth-century Persian estimates of one million captives taken overall are extrapolations rather than counts.
No death toll can be established. Raiding, forced marches across the Karakum and conditions of captivity killed an unknown number; travellers described high mortality on the routes from Khorasan but produced no figures.
Russian and British diplomatic and traveller accounts, and the Russian emancipation records of 1873, document forced agricultural and domestic labour, the taking of children and the sale of women as concubines.
Uzbekistan, Iran, Kazakhstan