White slavery (also white slave trade or white slave trafficking) refers to the slavery of European, whether by non-Europeans (such as West Asians and North Africans), or by other Europeans (for example naval galley slaves or the Vikings' thralls). Slaves of European origin were present in ancient Rome and the Ottoman Empire. Many different types of white people were enslaved. On the European continent under feudalism, there were various forms of status applying to people (such as serf, bordar, villein, vagabond, and slave) who were indentured or forced to labor without pay. Under Muslim rule, the Ottoman slave trade that included European captives was often fueled by raids into European territories or were taken as children in the form of a blood tax from the families of citizens of conquered territories to serve the empire for a variety of functions. In the mid-19th century, the term 'white slavery' was used to describe the Christian slaves that were sold into the Barbary slave trade. The modern legal term applies more narrowly to sexual slavery, forced prostitution, and human trafficking, with less focus on the race of victims or perpetrators. History The phrase "white slavery" was used by Charles Sumner in 1847 to describe the slavery of Christians throughout the Barbary States and primarily in Algiers, the capital of Ottoman Algeria. It also encompassed many forms of slavery, including the European concubines (Cariye) often found in Turkish harems. The term was also used by Clifford G. Roe from the beginning of the twentieth century to campaign against the forced prostitution and sexual slavery of girls who worked in Chicago brothels. Similarly, countries of Europe signed in Paris in 1904 an International Agreement for the suppression of the White Slave Traffic aimed at combating the sale of women who were forced into prostitution in the countries of continental Europe. White slave trade Slavic slaves The Volga trade route was established by the Varangians (Vikings) who settled in Northwestern Ruthenia in the early 9th century. About south of the Volkhov River entry into Lake Ladoga, they established a settlement called Ladoga (Old Norse: Aldeigjuborg). It connected Northern Europe and Northwestern Ruthenia with the Caspian Sea, via the Volga River. The Rus used this route to trade with Muslim countries on the southern shores of the Caspian Sea, sometimes penetrating as far as Baghdad. The route functioned concurrently with the Dnieper trade route, better known