Joint Border Commission with Cameroon reviewed 2002 ICJ ruling on the entire boundary and bilaterally resolved differences, including June 2006 Greentree Agreement that immediately cedes sovereignty of the Bakassi Peninsula to Cameroon with a phaseout of Nigerian control within two years while resolving patriation issues; the ICJ ruled on an equidistance settlement of Cameroon-Equatorial Guinea-Nigeria maritime boundary in the Gulf of Guinea, but imprecisely defined coordinates in the ICJ decision and a sovereignty dispute between Equatorial Guinea and Cameroon over an island at the mouth of the Ntem River all contribute to the delay in implementation; only Nigeria and Cameroon have heeded the Lake Chad Commission's admonition to ratify the delimitation treaty which also includes the Chad-Niger and Niger-Nigeria boundaries; location of Benin-Niger-Nigeria tripoint is unresolved
Libya claims about 25,000 sq km in a currently dormant dispute in the Tommo region; location of Benin-Niger-Nigeria tripoint is unresolved; only Nigeria and Cameroon have heeded the Lake Chad Commission's admonition to ratify the delimitation treaty that also includes the Chad-Niger and Niger-Nigeria boundaries; the dispute with Burkina Faso was referred to the ICJ in 2010
Refugees and internally displaced persons
refugees (country of origin): 67,456 (Cameroon) (2021)
IDPs: 2,880,168 (northeast Nigeria; Boko Haram attacks and counterinsurgency efforts in northern Nigeria; communal violence between Christians and Muslims in the middle belt region, political violence; flooding; forced evictions; cattle rustling; competition for resources) (2021)
refugees (country of origin): 182,730 (Nigeria), 61,156 (Mali) (2021)
IDPs: 300,320 (includes the regions of Diffa, Tillaberi, and Tahoua; unknown how many of the 11,000 people displaced by clashes between government forces and the Tuareg militant group, Niger Movement for Justice, in 2007 are still displaced; inter-communal violence; Boko Haram attacks in southern Niger, 2015) (2021)
