Omdurman (standard Arabic Umm Durmn) is the largest city in Sudan and Khartoum State, lying on the western banks of the River Nile, opposite the capital, Khartoum. Omdurman has a population of 2,395,159 (2008) and is the national centre of commerce. With Khartoum and Khartoum North or Bahri, it forms the cultural and industrial heart of the nation. In 1884, Muammad Amad, 'the Mahdi', made his military headquarters in the village of Omdurman. The conflicts that followed over the next fifteen years have become known as the Mahdist War. Following the defeat of the besieged defenders of Khartoum in 1885, the Mahdi's successor, Khalifa Abdullahi ibn Muammad, made Omdurman his capital. The city, now the location of the tomb of the Mahdi, grew rapidly.
Contributions by Dr. Blofeld, Kitia, and Reenem.