as the trade route from the Varangians to the Greeks, and lost its importance in the 11th century. Saqaliba originally was used to denote Slavic people, however later it came to denote all European slaves in some Muslim regions like Spain including those abducted from raids on Christian kingdoms of Spain. The Franks started buying slaves from the Slavs and Avar Khaganate while Muslims also came across slaves in the form of mercenaries serving the Byzantine Empire and settlers in addition to among the Khazars. Most Slavic slaves were imported to the Muslim world through the border between Christian and Islamic kingdoms where castration centres were also located instead of the direct route. From there they were sent into Islamic Spain and other Muslim-ruled regions especially North Africa. The saqaliba gained popularity in Umayyad Spain especially as warriors. After the collapse of the Umayyads, they also came to rule over many of the taifas. With the conversion of Eastern Europe, the trade declined and there isn't much textual information on saqaliba after 11th century. Central Europe was the most favoured destination for importation of slaves alongside Central Asia and Bilad as-Sudan, though slaves from Northwestern Europe were also valued. This slave trade was controlled mostly by European slave traders. France and Venice were the routes used to send Slavic slaves to Muslim lands and Prague served as a major centre for castration of Slavic captives. The Emirate of Bari also served as an important port for this trade. Due to the Byzantine Empire and Venice blocking Arab merchants from European ports, they later started importing in slave from the Caucasus and the Caspian Sea. The Saqaliba were also imported as eunuchs and concubines to Muslim states. The slavery of eunuchs in the Muslim world however was expensive and they thus were given as gifts by rulers. The Saqaliba eunuchs were prominent at the court of Aghlabids and later Fatimids who imported them from Spain. The Fatimids also used other Saqaliba slaves for military purposes. Crimean Khanate In the time of the Crimean Khanate, Crimeans engaged in frequent raids into the Danubian principalities, Poland–Lithuania, and Muscovy. For each captive, the khan received a fixed share (savğa) of 10 percent or 20 percent. The campaigns by Crimean forces categorize into sefers, declared military operations led by the khans themselves, and çapuls, raids undertaken by groups of noblemen, sometimes illegally because they contravened