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History

The Nilotic people of South Sudan—the Dinka, Anyuak, Bari, Acholi, Nuer, Shilluk, Kaligi (Arabic Feroghe), and others—first entered South Sudan sometime before the tenth century, coinciding with the fall of medieval Nubia. From the 15th to the 19th century, tribal migrations, largely from the area of Bahr el Ghazal, brought the Anyuak, Dinka, Nuer, and Shilluk to their modern locations in Bahr El Ghazal and the Upper Nile Region, while the Acholi and Bari settled in Equatoria. The Zande, Mundu, Avukaya and Baka, who entered South Sudan in the 16th century, established the region's largest state of Equatoria Region.

The Dinka is the largest, the Nuer the second-largest, the Zande the third-largest, and the Bari the fourth-largest of South Sudan's ethnic groups. They are found in the Maridi, Yambio, and Tombura districts in the tropical rainforest belt of Western Equatoria, the Adio of Azande client in Yei, Central Equatoria, and Western Bahr el Ghazal. In the 18th century, the Avungara sib rose to power over the rest of Azande society, a domination that continued into the 20th century. British policies favouring Christian missionaries, such as the Closed District Ordinance of 1922 (see History of Anglo-Egyptian Sudan), and geographical barriers such as the swamplands along the White Nile curtailed the spread of Islam to the south, thus allowing the southern tribes to retain much of their social and cultural heritage, as well as their political and religious institutions.

British colonial policy in Sudan had a long history of emphasizing the development of the Arab north and largely ignoring the Black African south, which lacked schools, hospitals, roads, bridges, and other basic infrastructure. After Sudan's first independent elections in 1958, the continued neglect of the southern region by the Khartoum government led to uprisings, revolts, and the longest civil war on the continent. People affected by the violence included the Dinka, Nuer, Shilluk, Anyuak, Murle, Bari, Mundari, Baka, Balanda Bviri, Boya, Didinga, Jiye, Kakwa, Kaligi, Kuku, Lotuka, Nilotic, Toposa, and Zande.

The Azande have had good relations with their neighbours, namely the Moru, Mundu, Pöjulu, Avukaya, Baka, and the small groups in Bahr el Ghazal, due to the expansionist policy of their king Gbudwe, in the 18th century. In the 19th century, the Azande fought the French, the Belgians and the Mahdists to maintain their independence. Ottoman Egypt, under the rule of Khedive Ismail Pasha, first attempted to control the region in the 1870s, establishing the province of Equatoria in the southern portion. Egypt's first appointed governor was Samuel Baker, commissioned in 1869, followed by Charles George Gordon in 1874, and by Emin Pasha in 1878.

The Mahdist Revolt of the 1880s destabilized the nascent province, and Equatoria ceased to exist as an Egyptian outpost in 1889. Important settlements in Equatoria included Lado, Gondokoro, Dufile, and Wadelai. European colonial manoeuvrings in the region came to a head in 1898, when the Fashoda Incident occurred at present-day Kodok; Britain and France almost went to war over the region. Britain then treated South Sudan as a distinct entity with a different stage of development than the North. This policy was legalized in 1930 by the announcement of the Southern Policy. In 1946, without consulting Southern opinion, the British administration reversed its Southern Policy and began instead to implement a policy of uniting the North and the South.

The region has been negatively affected by two civil wars since Sudanese independence: from 1955 to 1972, the Sudanese government fought the Anyanya rebel army (Anya-Nya is a term in the Madi language which means "snake venom") during the First Sudanese Civil War, followed by the Sudan People's Liberation Army/Movement (SPLA/M) in the Second Sudanese Civil War for over twenty years, from 1983 to 2005. As a result, the country suffered serious neglect, a lack of infrastructure development, and major destruction and displacement. More than 2.5 million people have been killed, and millions more have become refugees both within and outside the country.

South Sudan has an estimated population of 11 million people in 2023 but, given the lack of a census in several decades, this estimate may be severely distorted. The economy is predominantly rural and relies chiefly on subsistence farming. Around 2005, the economy began a transition from this rural dominance, and urban areas within South Sudan have seen extensive development.