Title: Slavery
Content:  Slavery was widespread in Africa, which pursued both internal and external slave trade. In the Senegambia region, between 1300 and 1900, close to one-third of the population was enslaved. In early Islamic states of the western Sahel, including Ghana, Mali, Segou, and Songhai, about a third of the population were enslaved. During the trans-Saharan slave trade, slaves from West Africa were transported across the Sahara desert to North Africa to be sold to Mediterranean and Middle eastern civilizations. The Indian Ocean slave trade, sometimes known as the east African slave trade, was multi-directional. Africans were sent as slaves to the Arabian Peninsula, to Indian Ocean islands (including Madagascar), to the Indian subcontinent, and later to the Americas. These traders captured Bantu peoples (Zanj) from the interior in present-day Kenya, Mozambique and Tanzania and brought them to the coast. There, the slaves gradually assimilated in rural areas, particularly on Unguja and Pemba islands.
Title: African-American history
Content:  region of Mozambique-Madagascar included the modern countries of Mozambique, parts of Tanzania and Madagascar. Studies of contemporary documents reveal seven regions from which Africans were sold or taken during the Atlantic slave trade. These regions were: The largest source of slaves transported across the Atlantic Ocean for the New World was West Africa. Some West Africans were skilled iron workers and were therefore able to make tools that aided in their agricultural labor. While there were many unique tribes with their own customs and religions, by the 10th century many of the tribes had embraced Islam. Those villages in West Africa which were lucky enough to be in good conditions for growth and success, prospered. They 
Title: Slavery in Africa
Content:  raiding and the end of wars between African states drastically reduced the supply of slaves. Slaves would take advantage of early colonial laws that nominally abolished slavery and would migrate away from their masters although these laws often were intended to regulate slavery more than actually abolish it. This migration led to more concrete abolition efforts by colonial governments. Following conquest and abolition by the French, over a million slaves in French West Africa fled from their masters to earlier homes between 1906 and 1911. In Madagascar over 500,000 slaves were freed following French abolition in 1896. In response to this pressure, Ethiopia officially 
Title: History of slavery in the Muslim world
Content:  Libya is a major exit point for African migrants heading to Europe. International Organization for Migration (IOM) published a report in April 2017 showing that many of the migrants from Sub-Saharan Africa heading to Europe are sold as slaves after being detained by people smugglers or militia groups. African countries south of Libya were targeted for slave trading and transferred to Libyan slave markets instead. According to the victims, the price is higher for migrants with skills like painting and tiling. Slaves are often ransomed to their families and in the meantime until ransom can be paid tortured, forced to work, sometimes to death and eventually executed or left to starve if they can't pay for too long. Women are often raped and used as sex slaves and sold to brothels and private Libyan clients. Many 
Title: Slavery in Africa
Content:  Many nations such as the Bono State, Ashanti of present-day Ghana and the Yoruba of present-day Nigeria were involved in slave-trading. Groups such as the Imbangala of Angola and the Nyamwezi of Tanzania would serve as intermediaries or roving bands, waging war on African states to capture people for export as slaves. Historians John Thornton and Linda Heywood of Boston University have estimated that of the Africans captured and then sold as slaves to the New World in the Atlantic slave trade, around 90% were enslaved by fellow Africans who sold them to European traders. Henry Louis Gates, the Harvard Chair of African and African American Studies, has stated that "without complex business partnerships between African elites and European traders and commercial agents, the slave trade to the New World would have been impossible, at least on the scale it occurred." The entire Bubi ethnic group descends from escaped intertribal slaves owned by various ancient West-central African ethnic groups.
Title: Slavery in Africa
Content:  slavery in 1932, Sokoto Caliphate abolished slavery in 1900, and the rest of the Sahel in 1911. Colonial nations were mostly successful in this aim, though slavery is still very active in Africa even though it has gradually moved to a wage economy. Independent nations attempting to westernize or impress Europe sometimes cultivated an image of slavery suppression, even as they, in the case of Egypt, hired European soldiers like Samuel White Baker's expedition up the Nile. Slavery has never been eradicated in Africa, and it commonly appears in African states, such as Chad, Ethiopia, Mali, Niger, and Sudan, in places where law and 
Title: African-American history
Content:  Before the Atlantic slave trade there were already people of African descent in America. A few countries in Africa would buy, sell, and trade other enslaved Africans, who were often prisoners of war, with the Europeans. The people of Mali and Benin are known for partaking in the event of selling their prisoners of war and other unwanted people off as slaves.
Title: History of slavery
Content:  1998 about the extent of trade coming through and from Africa, the Congolese journalist Elikia M'bokolo wrote "The African continent was bled of its human resources via all possible routes. Across the Sahara, through the Red Sea, from the Indian Ocean ports and across the Atlantic. At least ten centuries of slavery for the benefit of the Muslim countries (from the ninth to the nineteenth)." He continues: "Four million slaves exported via the Red Sea, another four million through the Swahili ports of the Indian Ocean, perhaps as many as nine million along the trans-Saharan caravan route, and eleven to twenty million (depending on the author) across the Atlantic Ocean"
Title: Slavery in Tunisia
Content:  regions of the central West Africa. The names of slaves and freedmen reported in archival documents confirm these multiple, diverse origins: beside common names like Burnaoui, Ghdamsi and Ouargli, are names indicating origin in other centres of West Africa like Jennaoui and Tombouctaoui. European slaves, for their part, were captured in the course of razzias on the coast of the European lands, mostly Italy, France, Spain and Portugal, and from the capture of European ships. The men were used for diverse tasks (slave drivers, public works, soldiers, public servant etc.), while women were used as domestic workers and in harems. Unlike the men, it was very rare for women to be freed, although the women often converted to Islam.
Title: Slavery in contemporary Africa
Content:  slavery continues in many parts of Africa despite being technically illegal. Slavery in the Sahel region (and to a lesser extent the Horn of Africa), exists along the racial and cultural boundary of Arabized Berbers in the north and darker Africans in the south. Slavery in the Sahel states of Mauritania, Mali, Niger, Chad and Sudan in particular, continues a centuries-old pattern of hereditary servitude. Other forms of traditional slavery exist in parts of Ghana, Benin, Togo and Nigeria. There are other, non-traditional forms of slavery in Africa today, mostly involving human trafficking and the enslavement of child soldiers and child labourers, e.g. human trafficking in Angola, and human trafficking of children from Togo, Benin 

Question: which countries in africa were slaves taken from?
Answer: Angola.