The 2005 Naivasha Agreement ended the civil war between the Sudanese government and the Sudanese Peoples Liberation Movement (SPLM), based in South Sudan.
About 2 million people were killed in the 1983-2005 conflict. A further 500,000 people were killed in the 1955-1972 civil war, also fought between the government and rebels in the south.
Under the agreement, a referendum on independence will be held in the south in January 2011. The SPLM leadership recently endorsed independence for the South, while prior to the peace process it been committed to a united, democratic, federal Sudan.