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.
South Sudan
Since independence, relations with Sudan have been changing. Sudan's President Omar al-Bashir first announced, in January 2011, that dual citizenship in the North and the South would be allowed, but upon the independence of South Sudan he retracted the offer. He has also suggested an EU-style confederation. Essam Sharaf, Prime Minister of Egypt after the 2011 Egyptian revolution, made his first foreign visit to Khartoum and Juba in the lead-up to South Sudan's secession. Israel quickly recognized South Sudan as an independent country, and is host to thousands of refugees from South Sudan, who now face deportation to their native country. According to American sources President Obama officially recognised the new state after Sudan (now North Sudan). Egypt, Sudan, Germany and Kenya were among the first to recognise the country's independence on 8 July 2011. Several states that participated in the international negotiations concluded with a self-determination referendum were also quick to acknowledge the overwhelming result. The Rationalist process included Kenya, Uganda, Egypt, Ethiopia, Libya, Eritrea, United Kingdom, Norway.