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Sudan was a collection of small, independent kingdoms and principalities from the beginning of the Christian era until 1820-21, when Egypt conquered and unified the northern portion of the country. However, neither the Egyptian nor the Mahdist state (1883-1898) had any effective control of the southern region outside of a few garrisons. Southern Sudan remained an area of fragmented tribes, subject to frequent attacks by slave raiders.  

Sudan was a collection of small, independent kingdoms and principalities from the beginning of the Christian era until 1820-21, when Egypt conquered and unified the northern portion of the country. However, neither the Egyptian nor the Mahdist state (1883-1898) had any effective control of the southern region outside of a few garrisons. Southern Sudan remained an area of fragmented tribes, subject to frequent attacks by slave raiders.  

In 1881, a religious leader named Muhammad ibn Abdalla proclaimed himself the Mahdi, or the "expected one," and began a religious crusade to unify the tribes in western and central Sudan. His followers took on the name "Ansars" (the followers) which they continue to use today and are associated with the single largest political grouping, the Umma Party, led by a descendant of the Mahdi, Sadiq al Mahdi.  

In 1881, a religious leader named Muhammad ibn Abdalla proclaimed himself the [[Mahdi]], or the "expected one," and began a religious crusade to unify the tribes in western and central Sudan. His followers took on the name "Ansars" (the followers) which they continue to use today and are associated with the single largest political grouping, the Umma Party, led by a descendant of the Mahdi, Sadiq al Mahdi.  

Taking advantage of dissatisfaction resulting from Ottoman-Egyptian exploitation and maladministration, the Mahdi led a nationalist revolt culminating in the fall of Khartoum in 1885. The Mahdi died shortly thereafter, but his state survived until overwhelmed by an invading Anglo-Egyptian force under Lord Kitchener in 1898. While nominally administered jointly by Egypt and Britain, Britain exercised control, formulated policies, and supplied most of the top administrators.  

Taking advantage of dissatisfaction resulting from Ottoman-Egyptian exploitation and maladministration, the Mahdi led a nationalist revolt culminating in the fall of Khartoum in 1885. The Mahdi died shortly thereafter, but his state survived until overwhelmed by an invading Anglo-Egyptian force under Lord Kitchener in 1898. While nominally administered jointly by Egypt and Britain, Britain exercised control, formulated policies, and supplied most of the top administrators.