Sudan People's Liberation Army/Movement in the context of "Second Sudanese Civil War"

Southern Sudan (Arabic: حكومة جنوب السودان Ḥukūmat Janūb as-Sūdān; Dinka: Lɔ̈k Bïkrotmac Paguot Thudän) was an autonomous region consisting of the ten southern states of Sudan between its formation in July 2005 and independence as the Republic of South Sudan in July 2011. The autonomous government was initially established in Rumbek and later moved to Juba. It was bordered by Ethiopia to the east; Kenya, Uganda, and the Democratic Republic of the Congo to the south; and the Central African Republic to the west. To the north lies the predominantly Arab and Muslim region directly under the control of the central government. The region's autonomous status was a condition of a peace agreement between the Sudan People's Liberation Army/Movement (SPLA/M) and the Government of Sudan represented by the National Congress Party ending the Second Sudanese Civil War. The conflict was Africa's longest running civil war.

A referendum took place in Southern Sudan from 9 to 15 January 2011, on whether the region should remain a part of Sudan or become independent. The referendum was one of the consequences of the 2005 Naivasha Agreement between the Khartoum central government and the Sudan People's Liberation Army/Movement (SPLA/M).

A simultaneous referendum was supposed to be held in Abyei on whether to become part of South Sudan but it was postponed due to conflict over demarcation and residency rights.

Slavery in Sudan began in ancient times, and had a resurgence during the Second Sudanese Civil War (1983–2005). During the Trans-Saharan slave trade, many Nilotic peoples from the lower Nile Valley were purchased as slaves and brought to work elsewhere in North Africa and the Orient by Nubians, Egyptians, Berbers and Arabs.

Starting in 1995, many human rights organizations have reported on contemporary practice, especially in the context of the Second Sudanese civil war. According to reports of Human Rights Watch and others, during the war the government of Sudan was involved in backing and arming numerous slave-taking militias in the country as part of its war against the Sudan People's Liberation Army (SPLA). It also found the government failed to enforce Sudanese laws against kidnapping, assault and forced labor, or to help victims' families locate their children.