According to Ann Brower Stahl, a professor of Anthropology specializing in Africa studies, the medieval towns of Banda people such as Begho were probably a source of slaves between 1400 and 1600 CE, with slaves going to Islamic North Africa, the primary trade being in women and children before 1500 CE. By the 16th century, slaves from the Banda regions were in use as production labor in Sudanese Islamic states, and this trade in slaves remained fairly steady in the centuries that followed. Dennis Cordell, a professor of History specializing on Africa, places the slave raiding and trade practices earlier to the 11th- and 12th-century raids in southern Libya, then to Lake Chad area, which he states thereafter expanded south into the Banda people's region.