Chad Basin British and French concluded an agreement to clarify the boundary between French West Africa and what would become Nigeria. A boundary was agreed along a line from Say on the Niger to Barruwa on Lake Chad, but leaving the Sokoto Caliphate in the British sphere. Parfait-Louis Monteil was given charge of an expedition to discover where this line actually ran. On 9 April 1892 he reached Kukawa on the shore of the lake. Over the next twenty years a large part of the Chad Basin was incorporated by treaty or by force into French West Africa. On 2 June 1909
A3 highway (Nigeria) Gamboru-Ngala Local Government conveying commodities from the two countries are now left stranded on either sides of the bridge. On May 13, 2014, the House of Representatives "called on the Federal Government to rebuild the Gamboru Bridge linking the border town with other parts of Borno State." A3 highway (Nigeria) The A3 highway is a highway in Nigeria. It runs generally north from Port Harcourt through Aba, Umuahia, Okigwe, Enugu, Ngwo, Makurdi, Lafia, Jos, Bauchi and Potiskum thence east via Damaturu, Maiduguri to the border with Cameroon at Gambaru. The continuation through Cameroon connects to N'Djamena, the capital of Chad.