SOURCE: BBC News
Sudan - Africa's biggest country - has split in two. Southerners voted in a referendum to break away from the north and on 9 July 2011 the independent country of South Sudan was born. These maps show the extent of the divisions in Sudan - a richer, Arabic-speaking, Muslim north and a poorer south devastated by years of conflict and neglect.
Sudan exports billions of dollars of oil per year. Southern states produce more than 80% of it, but receive only 50% of the revenue. The pipelines run north but the two sides have still not agreed how to share the oil wealth in the future.