History of Sudan association with the single largest political grouping, the [[National Umma Party Sudan|Umma Party]] (once led by a descendant of the Mahdi, [[Sadiq al Mahdi]]). Taking advantage of conditions resulting from Ottoman-Egyptian exploitation and maladministration, the Mahdi led a nationalist revolt culminating in the fall of [[Khartoum]] on 26 January 1885. The interim governor-general of the Sudan, the British Major-General [[Charles George Gordon]], and many of the fifty thousand inhabitants of Khartoum were massacred. The Mahdi died in June 1885. He was followed by [[Abdallahi ibn Muhammad]], known as the [[Caliph|Khalifa]], who began an expansion of Sudan's area into Ethiopia. Following
Siege of Khartoum Siege of Khartoum The Battle of Khartoum, Siege of Khartoum or Fall of Khartoum was the conquest of Egyptian-held Khartoum by the Mahdist forces led by Muhammad Ahmad. Egypt had held the city for some time prior, but the siege that the Mahdists engineered and carried out from 13 March 1884 to 26 January 1885 was enough to wrest control away from the Egyptian administration. After a ten-month siege, when the Mahdists finally broke into the city, the entire garrison of Egyptian soldiers was killed along with 4,000 Sudanese civilians. Since the 1882 Anglo-Egyptian War, the British military presence had