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
Chad–Nigeria relations the wake of the Chibok schoolgirl kidnapping, Chad's minister of national defense, Benaindo Tatola, met with Cameroon's defense minister Edgard Allain Mebe Ngo'o in Yaounde. "Ngo'o said Chad had also deployed troops to work together with Cameroonian forces on the borders with Nigeria. He also said troops from the two countries will cross into Nigeria and fight Boko Haram in collaboration with Nigerian forces." Chad–Nigeria relations Nigeria considered France its primary rival in its attempt to chart the course of West Africa's political development. Its generally paternalistic relations with Chad intensified after the coup that ousted President François Tombalbaye in