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.
Sudan People's Liberation Movement
The Sudan People's Liberation Movement (SPLM) (, "Al-Ḥarakat ash-Shaʿbiyyat liTaḥrīr as-Sūdān") is a political party in South Sudan. It was initially founded as the political wing of the Sudan People's Liberation Army (SPLA, key protagonist of the Second Sudanese Civil War) in 1983. On January 9, 2005 the SPLA, SPLM and Government of Sudan signed the Comprehensive Peace Agreement, ending the civil war. SPLM then obtained representation in the Government of Sudan, and was the main constituent of the Government of the then semi-autonomous Southern Sudan. When South Sudan became a sovereign state on 9 July 2011, SPLM became the ruling party of the new republic. SPLM branches in Sudan separated themselves from SPLM, forming the Sudan People's Liberation Movement-North. Further factionalism appeared as a result of the 2013-2014 South Sudanese Civil War, with President Salva Kiir leading the SPLM-Juba and former Vice President Riek Machar leading the Sudan People's Liberation Movement-in-Opposition.