History of Sudan
The modern Republic of Sudan was formed in 1956 and inherited its boundaries from Anglo-Egyptian Sudan, established in 1899. For times predating 1899, usage of the term "Sudan" for the territory of the Republic of Sudan was somewhat anachronistic, and may have referred to the more diffuse concept of the Sudan.
History of Sudan (1969–85)
On May 25, 1969, several young officers calling themselves the Free Officers Movement seized power in Sudan and started the Nimeiri era in the history of Sudan. At the conspiracy's core were nine officers led by Colonel Jaafar an Nimeiri, who had been implicated in plots against the Abboud regime. Nimeiri's coup preempted plots by other groups, most of which involved army factions supported by the Sudanese Communist Party (SCP), Arab nationalists, or conservative religious groups. He justified the coup on the grounds that civilian politicians had paralyzed the decision-making process, had failed to deal with the country's economic and regional problems, and had left Sudan without a permanent constitution.