Cameroon–Nigeria relations

Relations between Cameroon and Nigeria were established in 1960, the same year that each country obtained its independence. Since then, their relationship has revolved in large part around their extensive shared border, as well as the legacy of colonial arrangements under which areas of Cameroon were administered as part of British Nigeria. The countries came close to war in the 1990s in the culmination of a long-running dispute over the sovereignty of the Bakassi peninsula. In the 21st century, however, a return to conviviality has been achieved, partly because the demarcation of their border has been formalised, and partly because the Boko Haram insurgency in the Lake Chad basin has necessitated increasingly close cooperation in regional security matters.