Siege of Khartoum currency to the post of Governor-general in January 1884 and arrived at Khartoum on 18 February 1884, less than one month prior to the siege. Muhammad Ahmad bin Abd Allah, self-proclaimed Mahdi, engaged in an 18-year Mahdist War (1881–99) against the British Empire (Khedivate of Egypt), the Ethiopian Empire, the Congo Free State, and the Kingdom of Italy. In a series of telegrams in early March, 1884, Gordon informed the British government that the Mahdi were closing the roads, cutting off supplies and severing telegraph communications. As the fighting drew closer to the city walls, and the blockade tightened, the siege
Khartoum main Nile ("see map, upper right") as it zigzags through northern Sudan into Egypt at Lake Nasser. Khartoum is relatively flat, at elevation , as the Nile flows northeast past Omdurman to Shendi, at elevation about away. Under Köppen's climate classification system, Khartoum features a hot arid climate, with only the summer months seeing noticeable precipitation. The city averages a little over of precipitation per year. Based on annual mean temperatures, the city is one of the hottest major cities in the world. Temperatures routinely exceed in mid-summer. Its average annual high temperature is , with six months of the