The border follows the Red Volta briefly to the south-east, before turning to the north-east via a series of irregular overland lines.
It then reaches the White Volta, following this river briefly, and then the Nouhao, before it turns to the south-east in a straight line down to the Togolese tripoint.
[5] The British gradually extended their rule into the interior, against often determined resistance by native kingdoms such as the Asante; the northern region of what is now Ghana was annexed to the Gold Coast colony in 1901.
The process culminated in the Berlin Conference of 1884, in which the European nations concerned agreed upon their respective territorial claims and the rules of engagements going forward.
France occupied this area in 1900; Mali (then referred to as French Sudan) was originally included, along with modern Niger and Burkina Faso (then referred to as Upper Volta, within the Upper Senegal and Niger colony and became a constituent of the federal colony of French West Africa (Afrique occidentale française, abbreviated AOF).