East Africa or Eastern Africa is the easterly region of the African continent, variably defined by geography or geopolitics. In the UN scheme of geographic regions, 20 territories constitute Eastern Africa:
- Tanzania, Kenya, Uganda, Rwanda and Burundi – in Central East Africa, are also included in the African Great Lakes region and are members of the East African Community (EAC). Burundi and Rwanda are sometimes also considered to be part of Central Africa.
- Djibouti, Eritrea, Ethiopia and Somalia – collectively known as the Horn of Africa.
- Comoros, Mauritius and Seychelles – small island nations in the Indian Ocean.
- Réunion and Mayotte – French overseas territories also in the Indian Ocean.
- Mozambique and Madagascar – often considered part of Southern Africa, on the eastern side of the sub-continent. Madagascar has close cultural ties to Southeast Asia and the islands of the Indian Ocean.
- Malawi, Zambia and Zimbabwe – often also included in Southern Africa, and formerly of the Central African Federation.
- South Sudan – newly independent from Sudan.
- Egypt and Sudan are in the northeastern portion of the continent, but are usually included in Northern Africa.
Due to colonial territories of the British East Africa Protectorate and German East Africa, the term East Africa is often (especially in the English language) used to specifically refer to the area now comprising the three countries of Kenya, Tanzania and Uganda. However, this has never been the convention in many other languages, where the term generally had a wider, strictly geographic context and therefore typically included Djibouti, Eritrea, Ethiopia, Somalia and Sudan.
It is the predominantly held belief within the scientific community that eastern Africa is the single home of the origin of modern humans, but it is debated on that it might not be the original home of the humans who first migrated out of the continent.
Geography and climate
Some parts of East Africa have been renowned for their concentrations of wild animals, such as the "big five" of elephant, buffalo, lion, leopard and black rhinoceros, though populations have been declining under increased stress in recent times, particularly the rhino and elephant.
The geography of East Africa is often stunning and scenic. Shaped by global plate tectonic forces that have created the East African Rift, East Africa is the site of Mount Kilimanjaro and Mount Kenya, the two tallest peaks in Africa. It also includes the world's second largest freshwater lake Lake Victoria, and the world's second deepest lake Lake Tanganyika.
The climate of East Africa is rather atypical of equatorial regions. Because of a combination of the region's generally high altitude and the rain shadow of the westerly monsoon winds created by the Rwenzori Mountains and Ethiopian Highlands, East Africa is surprisingly cool and dry for its latitude.
In fact, on the coast of Somaliland and Puntland many years can go by without any rain whatsoever. Elsewhere the annual rainfall generally increases towards the south and with altitude, being around 400 millimetres (16 in) at Mogadishu and 1,200 millimetres (47 in) at Mombasa on the coast, whilst inland it increases from around 130 millimetres (5 in) at Garoowe to over 1,100 millimetres (43 in) at Moshi near Kilimanjaro. Unusually, most of the rain falls in two distinct wet seasons, one centred around April and the other in October or November. This is usually attributed to the passage of the Intertropical Convergence Zone across the region in those months, but it may also be analogous to the autumn monsoon rains of parts of Sri Lanka, Vietnam and the Brazilian Nordeste.
West of the Rwenzoris and Ethiopian highlands the rainfall pattern is more typically tropical, with rain throughout the year near the equator and a single wet season in most of the Ethiopian Highlands from June to September - contracting to July and August around Asmara. Annual rainfall here ranges from over 1,600 millimetres (63 in) on the western slopes to around 1,250 millimetres (49 in) at Addis Ababa and 550 millimetres (22 in) at Asmara. In the high mountains rainfall can be over 2,500 millimetres (98 in).
Rainfall in East Africa is influenced by El Niño events, which tend to increase rainfall except in the northern and western parts of the Ethiopian and Eritrean highlands, where they produce drought and poor Nile floods.
Temperatures in East Africa, except on the hot and generally humid coastal belt, are moderate, with maxima of around 25 °C (77 °F) and minima of 15 °C (59 °F) at an altitude of 1,500 metres (4,921 ft). At altitudes of above 2,500 metres (8,202 ft), frosts are common during the dry season and maxima typically about 21 °C (70 °F) or less.
The unique geography and apparent suitability for farming made East Africa a target for European exploration, exploitation and colonialization in the nineteenth century. Today, tourism is an important part of the economies of Kenya, Tanzania, Seychelles,and Uganda.
According to the theory of recent African origin of modern humans, the mainstream position held within the scientific community, all humans originate from East Africa. Some of the earliest fossilized hominid remains have been found in East Africa, including those found in Awash Valley of Ethiopia, Koobi Fora in Kenya and Olduvai Gorge in Tanzania.
The southern part of East Africa was occupied until recent times by Khoisan hunter-gatherers, whilst in the Ethiopian Highlands the donkey and such crop plants as teff allowed the beginning of agriculture around 7,000 B.C. Lowland barriers and diseases carried by the tsetse fly, however, prevented the donkey and agriculture from spreading southwards. Only in quite recent times has agriculture spread to the more humid regions south of the equator, through the spread of cattle, sheep and crops such as millet. Language distributions suggest that this most likely occurred from Sudan into modern Uganda and the African Great Lakes, since the Nilotic languages spoken by these pre-Bantu farmers have their closest relatives in the middle Nile basin.
The Land of Punt may have been in the Horn of Africa region, although some Ancient Egyptian evidence points to Punt being in Arabia. There is some evidence of a Queen of Sheba around the 10th century BC near Ethiopia or alternately in Yemen across the Red Sea. The Dʿmt were also from this time period. The Sabaean Kingdom held parts of the Horn of Africa during this time.
Later, the Kingdom of Aksum (or Axum) arose on the coasts of the Red Sea, existing from approximately 100–940 AD. The Himyarite Kingdom briefly held land in the Horn of Africa around 100 BC to 240 AD, when it was re-conquered by a resurgent Sabaean Kingdom.
A lot of the culture and people of ancient times found on the Red Sea coast were originally from the Arabian Peninsula, such as the Minaeans and Sabaeans, who settled coastal areas of the Red Sea. There is evidence that the distance between Arabia and Africa was less than its current 20 mile distance at Bab-el-Mandeb and that people migrated across the Red Sea freely, even in ancient and prehistorical times.
Between 2500–3000 years ago, Bantu-speaking peoples began a millennia-long series of migrations eastward from their homeland that is (today known as) southern Cameroon across the Rwenzori Mountains. This Bantu expansion introduced agriculture into those parts of East Africa either not reached previously by Nilo-Saharan farmers or too wet for millet. During the following fifteen centuries, the Bantu slowly intensified farming and grazing over all suitable regions of East Africa, in the process making contact with Austronesian- and Arabic-speaking sailors on the southern coastal areas. The latter also spread Islam to the coastal belt, but most Bantu never had contact with Islam and remained African Traditional Religion adherents.
Over a period of many centuries, most hunting-foraging peoples were displaced and absorbed by incoming Bantu communities, as well as by later Nilotic communities. The Bantu expansion was a long series of physical migrations, a diffusion of language and knowledge out into and in from neighboring populations, and a creation of new societal groups involving inter-marriage among communities and small groups moving to communities and small groups moving to new areas.
After their movements from their original homeland in West Africa, Bantus also encountered in central east Africa peoples of Cushitic origin. As cattle terminology in use amongst the few modern Bantu pastoralist groups suggests, the Bantu migrants would acquire cattle from their new Cushitic neighbors. Linguistic evidence also indicates that Bantus likely borrowed the custom of milking cattle directly from Cushitic peoples in the area.
On the coastal section of the African Great Lakes region, another mixed Bantu community developed through contact with Muslim Arab and Persian traders, leading to the development of the mixed Arab, Persian and African Swahili City States. The Swahili culture that emerged from these exchanges evinces many Arab and Islamic influences not seen in traditional Bantu culture, as do the many Afro-Arab members of the Bantu Swahili people. With its original speech community centered on the coastal parts of Tanzania (particularly Zanzibar) and Kenya—a seaboard referred to as the Swahili Coast—the Bantu Swahili language contains many Arabic loan-words as a consequence of these interactions.
The earliest Bantu inhabitants of the east coast of Kenya and Tanzania encountered by these later Arab and Persian settlers have been variously identified with the trading settlements of Rhapta, Azania and Menouthias  referenced in early Greek and Chinese writings from 50 CE to 500 CE, ultimately giving rise to the name for Tanzania. These early writings perhaps document the first wave of Bantu settlers to reach central east Africa during their migration.
Arab and Portuguese eras
The Portuguese were the first Europeans to explore the region of current-day Kenya, Tanzania, and Mozambique by sea, Vasco da Gama having visited Mombasa in 1498. Gama's voyage was successful in reaching India and this permitted the Portuguese to trade with the Far East directly by sea, thus challenging older trading networks of mixed land and sea routes, such as the spice trade routes that utilized the Persian Gulf, Red Sea and camel caravans to reach the eastern Mediterranean.
The Republic of Venice had gained control over much of the trade routes between Europe and Asia. After traditional land routes to India had been closed by the Ottoman Turks, Portugal hoped to use the sea route pioneered by Gama to break the once Venetian trading monopoly. Portuguese rule in the African Great Lakes region focused mainly on a coastal strip centred in Mombasa. The Portuguese presence in the area officially began after 1505, when flagships under the command of Don Francisco de Almeida conquered Kilwa, an island located in what is now southern Tanzania.
In March 1505, having received from Manuel I of Portugal the appointment of viceroy of the newly conquered territory in India, he set sail from Lisbon in command of a large and powerful fleet, and arrived in July at Quiloa (Kilwa), which yielded to him almost without a struggle. A much more vigorous resistance was offered by the Moors of Mombasa. However, the town was taken and destroyed, and its large treasures went to strengthen the resources of Almeida. Attacks followed on Hoja (now known as Ungwana, located at the mouth of the Tana River), Barawa, Angoche, Pate and other coastal towns until the western Indian Ocean was a safe haven for Portuguese commercial interests. At other places on his way, such as the island of Angediva, near Goa, and Cannanore, the Portuguese built forts, and adopted measures to secure the Portuguese supremacy.
Portugal's main goal on the Swahili coast was to take control of the spice trade from the Arabs. At this stage, the Portuguese presence in East Africa served the purposes of controlling trade within the Indian Ocean and securing the sea routes linking Europe to Asia. Portuguese naval vessels were very disruptive to the commerce of Portugal's enemies within the western Indian Ocean and were able to demand high tariffs on items transported through the sea due to their strategic control of ports and shipping lanes. The construction of Fort Jesus in Mombasa in 1593 was meant to solidify Portuguese hegemony in the region, but their influence was clipped by the British, Dutch and Omani Arab incursions into the Great Lakes region during the 17th century.
The Omani Arabs posed the most direct challenge to Portuguese influence in the African Great Lakes regigon. They besieged Portuguese fortresses, openly attacked naval vessels and expelled the Portuguese from the Kenyan and Tanzanian coasts by 1730. By this time, the Portuguese Empire had already lost its interest on the spice trade sea route due to the decreasing profitability of that business. The Arabs reclaimed much of the Indian Ocean trade, forcing the Portuguese to retreat south where they remained in Portuguese East Africa (Mozambique) as sole rulers until the 1975 independence of Mozambique.
Omani Arab colonization of the Kenyan and Tanzanian coasts brought the once independent city-states under closer foreign scrutiny and domination than was experienced during the Portuguese period. Like their predecessors, the Omani Arabs were primarily able only to control the coastal areas, not the interior. However, the creation of clove plantations, intensification of the slave trade and relocation of the Omani capital to Zanzibar in 1839 by Seyyid Said had the effect of consolidating the Omani power in the region.
Arab governance of all the major ports along the Swahili coast continued until British interests aimed particularly at ending the slave trade and creation of a wage-labour system began to put pressure on Omani rule. By the late nineteenth century, the slave trade on the open seas had been completely outlawed by the British and the Omani Arabs had little ability to resist the British navy's ability to enforce the directive. The Omani presence continued in Zanzibar and Pemba until the Zanzibar Revolution in 1964. However, the official Omani Arab presence in Kenya was checked by German and British seizure of key ports and creation of crucial trade alliances with influential local leaders in the 1880s.
Period of European imperialism
Between the 19th and 20th century, East Africa became a theatre of competition between the major imperialistic European nations of the time.
Portugal had first established a strong presence in southern Mozambique and the Indian Ocean since the 15th century, while during this period their possessions increasingly grew including parts from the present northern Mozambique country, up to Mombasa in present day Kenya. At Lake Malawi, they finally met the recently created British Protectorate of Nyasaland (nowadays Malawi), which surrounded the homonymous lake on three sides, leaving the Portuguese the control of lake's eastern coast. The British Empire set foot in the region's most exploitable and promising lands acquiring what is today Uganda, and Kenya. The Protectorate of Uganda and the Colony of Kenya were located in a rich farmland area mostly appropriate for the cultivation of cash crops like coffee and tea, as well as for animal husbandry with products produced from cattle and goats, such as goat meat, beef and milk. Moreover this area had the potential for a significant residential expansion, being suitable for the relocation of a large number of British nationals to the region. Prevailing climatic conditions and the regions' geomorphology allowed the establishment of flourishing European style settlements like Nairobi, Vila Pery, Vila Junqueiro, Porto Amélia, Lourenço Marques and Entebbe.
The French settled the largest island of the Indian Ocean (and the fourth-largest globally), Madagascar, along with a group of smaller islands nearby, namely Réunion and the Comoros. Madagascar became part of the French colonial empire following two military campaigns against the Kingdom of Madagascar, which it initiated after persuading Britain to relinquish its interests in the island in exchange for control of Zanzibar off the coast of Tanganyika, an important island hub of the spices trade. The British also held a number of island colonies in the region, including the extended archipelago of Seychelles and the rich farming island of Mauritius, previously under the French sovereignty.
The German Empire gained control of a large area named German East Africa, comprising present-day Rwanda, Burundi and the mainland part of Tanzania named Tanganyika. In 1922, the British gained a League of Nations mandate over Tanganyika which it administered until Independence was granted to Tanganyika in 1961. Following the Zanzibar Revolution of 1965, the independent state of Tanganyika formed the United Republic of Tanzania by creating a union between the mainland, and the island chain of Zanzibar. Zanzibar is now a semi-autonomous state in a union with the mainland which is collectively and commonly referred to as Tanzania. German East Africa, though very extensive, was not of such strategic importance as the British Crown's colonies to the north: the inhabitation of these lands was difficult and thus limited, mainly due to climatic conditions and the local geomorphology.
Meanwhile, in 1884, a narrow coastal strip of northern Somalia came under British control (British Somaliland). This northern protectorate was just opposite the British colony of Aden on the Arabian Peninsula. With these territories secured, Britain was able to serve as gatekeeper of the sea lane leading to British India.
In 1895, from bases in Somalia and Eritrea, the Italians launched the First Italo–Ethiopian War against the Orthodox Empire of Ethiopia. By 1896, the war had become a total disaster for the Italians and Ethiopia was able to retain its independence. Ethiopia remained independent until 1936 when, after the Second Italo-Abyssinian War, it became part of Italian East Africa. The Italian occupation of Ethiopia ended in 1941 during World War II as part of the East African Campaign.
In the Horn of Africa, Afro-Asiatic languages predominate, including Amharic, Oromo, Tigrinya and Somali. In the African Great Lakes region, Bantu languages like Kikuyu, Ruanda-Rundi, and Luganda are most widely spoken; Nilo-Saharan languages, such as Luo, Kalenjin and Maasai, are also spoken in lesser numbers. Swahili, with at least 80 million speakers (as a first or second language), is an important trade language in the Great Lakes area, and has official status in Tanzania, Kenya and Uganda. European languages such as English, Portuguese, and to a lesser extent French, remain important in higher institutions in some parts of the larger region.
Until recently, several East African countries were riven with political coups, ethnic violence and oppressive dictators. Since the end of colonialism, the region has endured the following conflicts:
- Northern East Africa (Horn of Africa)
- Ethiopian Civil War 1974-1991
- Eritrean War of Independence 1961-1991
- Eritrean-Ethiopian War 1998-2000
- Ogaden War 1977-1978
- Somali Civil War 1991-ongoing
- South Sudan
- Southern East Africa (Southeast Africa)
- Burundi Civil War 1993-2005 and the Genocide of Hutus in 1972 and genocide of Tutsis in 1993
- Uganda-Tanzania War 1978-1979
- Ugandan Bush War 1981-1986
- Lord's Resistance Army insurgency in Uganda, South Sudan and Democratic Republic of the Congo ongoing
- Rwandan Civil War 1990-1993 and the Rwandan Genocide of Tutsis
- Zanzibar Revolution 1964
- Outside Southeast Africa with Southeast African participation
Tanzania has known stable government since independence although there are significant political and religious tensions resulting from the political union between Tanganyika and Zanzibar in 1964. Zanzibar is now a semi-autonomous state in the United Republic of Tanzania.
Rwanda, Uganda and Burundi have each faced instability and ethnic conflict since independence, most notably the 1995 Rwandan Genocide and the 1993 Burundi Genocide and subsequent Burundi Civil War. Rwanda and Uganda continue to be involved in related conflicts outside the region.
South Sudan peacefully seceded from Sudan in 2011, six and a half years after a peace agreement ended the Second Sudanese Civil War. South Sudanese independence was nearly derailed by the South Kordofan conflict, particularly a dispute over the status of the Abyei Area, and both Abyei and South Kordofan's Nuba Hills remain a source of tension between Juba and Khartoum.
- Ajuuraan State
- Aksumite Empire
- Arab slave trade
- British East Africa
- Common Market for Eastern and Southern Africa
- East African Campaign (World War I)
- East African Campaign (World War II)
- East African Community
- German East Africa
- Horn of Africa
- Italian East Africa
- Land of Punt
- Southeast Africa
- African Great Lakes
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