excerpt from Holocaust Museum Houston
Civil war has existed between the northern and southern regions of Sudan for more than a decade. The northern region, centered on the capital of Khartoum, is predominantly made up of Muslims who are ethnically Arab, while groups of Christians and animists live in the south. The Khartoum government under General Omar al-Bashir wished to create a more Islamic-based government that was opposed by the southern groups and led to civil war.
Not until 2005, and with heavy international influence, did the Comprehensive Peace Agreement end the two-decade-long civil war that had resulted in more than 2 million deaths and 4 million displaced persons in the south. In the western region of Darfur, a rebel group sought to have the same benefits and attacked a government outpost in 2003. The government of Sudan reacted with crushing brutality.
red more: https://hmh.org/library/research/genocide-in-darfur-guide/