The Arab trade of Zanj (Bantu) slaves in Southeast Africa is one of the oldest slave trades. It was going on 700 years before the European Atlantic slave trade. Male slaves were often employed as servants, soldiers, or workers by their owners. Most male slaves were castrated. It is estimated that as many as 6 out of every 10 boys bled to death during the process. But the high price of Eunuchs made it worthwhile. Woman and children taken as slaves were mainly used as servants and concubines. While the later Atlantic slave trade concentrated on men for labor, the Arab slave trade shifted over time to concentrate more on woman and young girls for sexual purposes.