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
South Sudan (), officially known as the Republic of South Sudan, is a landlocked country in East-Central Africa. The country gained its independence from the Republic of the Sudan in 2011, making it the newest country with widespread recognition. Its capital and largest city is Juba.