Ethiopians went to South Arabia in the 2nd century and the 4th century. By 532 AD they had invaded Yemen. After this, many more Africans came to South Arabia as slaves; men were usually traded and the women were kept as servants for the Arab leaders. Mixed race children were more valuable in South Arabia. Two such children became Princes of the Abbassids. At this time, the Arabian army, known as the Sabaens, moved to Ethiopia. In Iraq, Bantu-speaking Africans were called Zanj. The large number of Zanj slaves working in bad conditions in Iraq lead to the famous Zanj Rebellion over fifteen years (869-883 AD). African rebels took over many of Iraq's cities forcing Arabs to flee to African nations such as Kenya, Somalia and Tanzania. Today someone of African and Arab descent is considered Afro-Arab.