Disputes - international:
the effects of Sudan's almost constant ethnic and rebel militia fighting since the mid-twentieth century have penetrated all of its border states that provide shelter for fleeing refugees and cover to disparate domestic and foreign conflicting elements; since 2003, Janjawid armed militia and Sudanese military have driven about 200,000 Darfur region refugees into eastern Chad; large numbers of Sudanese refugees have also fled to Uganda, Ethiopia, Kenya, the Central African Republic, and the Democratic Republic of the Congo; southern Sudan provides shelter to Ugandans seeking periodic protection from soldiers of the Lord's Resistance Army; Sudan accuses Eritrea of supporting Sudanese rebel groups; efforts to demarcate the porous boundary with Ethiopia have been delayed by civil and ethnic fighting in Sudan; Kenya's administrative boundary extends into the southern Sudan, creating the "Ilemi Triangle"; Egypt and Sudan retain claims to administer triangular areas that extend north and south of the 1899 Treaty boundary along the 22nd Parallel, but have withdrawn their military presence; Egypt is economically developing the "Hala'ib Triangle" north of the Treaty Line; periodic violent skirmishes with Sudanese residents over water and grazing rights persist among related pastoral populations from the Central African Republic along the border
Refugees and internally displaced persons:
refugees (country of origin): 110,927 (Eritrea) 5,023 (Chad) 7,983 (Uganda) 14,812 (Ethiopia)
IDPs: 5,300,000 - 6,200,000 (internal conflict since 1980s; ongoing genocide) (2005)