World Wars I and II were very probably the most destructive conflicts in African history. In terms of the human costs—the numbers of people mobilized, the scale of violence and destruction experienced--as well as their enduring political and social impact, no other previous conflicts are comparable, particularly over such short periods as four and ten years, respectively. All told, about 4,500,000 African soldiers and military laborers were mobilized during these wars and about 2,000,000 likely died. Mobilization on this scale among African peasant societies was only sustainable because they were linked to the industrial economies of a handful of West Central European nation states at the core of the global commercial infrastructure, which invariably subordinated African interests to European imperial imperatives. Militarily, these were expressed in two ways: by the use of African soldiers and supporting military laborers to conquer or defend colonies on the continent, or by the export of African combat troops and laborers overseas—in numbers far exceeding comparable decades during the 18th-century peak of the transatlantic slave trade—to Europe and Asia to augment Allied armies there. The destructive consequences of these wars were distributed unevenly across the continent. In some areas of Africa, human losses and physical devastation frequently approximated or surpassed the worst suffering experienced in Europe itself; yet, in other areas of the continent, Africans remained virtually untouched by these wars. These conflicts contributed to an ever-growing assertiveness of African human rights in the face of European claims to racial supremacy that led after 1945 to the restoration of African sovereignty throughout most of the continent. On a personal level, however, most Africans received very little for their wartime sacrifices. Far more often, surviving veterans returned to their homes with an enhanced knowledge of the wider world, perhaps a modicum of newly acquired personal prestige within their respective societies, but little else.
A. C. S. Peacock
In the mid-16th century, the Ottoman empire expanded to encompass parts of the modern Sudan, Eritrea, and the Ethiopian borderlands, forming the Ottoman province of Habeş. The Ottomans also provided aid to their ally Ahmad Grañ in his jihad against Ethiopia and fought with the Funj sultanate of Sinnar for control of the Nile valley, where Ottoman territories briefly extended south as far as the Third Cataract. After 1579, Ottoman control was limited to the Red Sea coast, in particular the ports of Massawa and Suakin, which remained loosely under Ottoman rule until the 19th century, when they were transferred to Egypt, nominally an Ottoman vassal but effectively independent. Politically, Ottoman influence was felt much more broadly in northeast Africa in places as distant as Mogadishu, at least nominally recognized Ottoman suzerainty.
Edward A. Alpers
The Indian Ocean has occupied an important place in the history of Africa for millennia, linking the continental land mass to the peoples, products, and ideas of the wider Indian Ocean world (IOW). Central to this relationship are environmental factors, including the biannual operation of monsoon winds, which determined the maritime movement of people, things, and ideas. The earliest of these connections involve the movement of food crops, domestic animals, and commensals both from and into Africa and its offshore islands. From the beginnings of the Current Era, Africa was an important Indian Ocean source of valuable commodities, such as ivory and gold; in more recent times, hardwood products like mangrove poles, and agricultural products like cloves, coconuts, and copra gained economic prominence. Enslaved African labor also had a long history in the IOW, the sources and destinations for the export trade varying over time. In addition, for centuries many different Indian Ocean immigrant communities played important roles as settlers, merchants, sailors, and soldiers. In the realm of culture and ideas, African music, dance, and spiritual concepts accompanied those Africans who were forcibly removed from the continent to the different Indian Ocean lands where they were enslaved. A further indicator of Indian Ocean connectivity is Islam, the introduction of which marks an important watershed in African history. The human settlement of Madagascar marks another significant Indian Ocean connection for Africa. At different times and in different ways, colonial rule—Portuguese, Dutch, Omani, French, and British—tied eastern African territories to India, Arabia, and Southeast Asia. Since regaining independence, African nation-states have established a variety of new linkages to other Indian Ocean states.