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.
Gaafar Nimeiry
Later in 1971 he was elected President winning a referendum with 98.6 per cent of the votes. He then dissolved the RCC and founded the Sudanese Socialist Union which he declared to be the only legal political organization. In 1972 he signed the Addis Ababa Agreement whereby autonomy was granted to the non-Muslim southern region of Sudan, which ended the First Sudanese Civil War and ushered in an 11-year period of peace and stability to the region. In 1973 he drafted a new constitution which declared Sudan to be a democratic, socialist state and gave considerable power to the office of President.