Sudan (region) to the present-day country of Sudan, the western part of which forms part of the larger region, and from which South Sudan gained its independence in 2011. The Sudan region extends in some 5,000 km in a band several hundred kilometers wide across Africa. It stretches from the border of Senegal, through southern Mali (formerly known as French Sudan when it was a French colony), Burkina Faso, southern Niger, northern Nigeria, northern Ghana, southern Chad, the western Darfur region of present-day Sudan, and South Sudan. To the north of the region lies the Sahel, a more arid Acacia savanna region
History of Sudan 19th century, and established a province [[Equatoria]] in southern Sudan to further this aim, it was unable to establish effective control over the area. In the later years of the Turkiyah, [[United Kingdom|British]] missionaries traveled from modern-day [[Kenya]] into the Sudan to convert the local tribes to Christianity. [[File:1875 slave merchant Khartoum.jpeg|thumb|200px|A typical slave merchant of Khartoum, 1875]] In 1881, a religious leader named [[Muhammad Ahmad]] proclaimed himself the [[Mahdi]] ("guided one") and began a war to unify the tribes in western and central Sudan. His followers took the name "[[Ansar (Sudan)|Ansar]]s" ("followers") which they continue to use today, in