Faso today was nominally conquered; however, control of many parts remained uncertain.
The French and British convention of 14 June 1898 ended the scramble between the two colonial powers and drew the borders between the countries' colonies. On the French side, a war of conquest against local communities and political powers continued for about five years. In 1904, the largely pacified territories of the Volta basin were integrated into the Upper Senegal and Niger colony of French West Africa as part of the reorganization of the French West African colonial empire. The colony had its capital in Bamako.
Draftees from the territory participated in the European fronts of World War I in the battalions of the Senegalese Rifles. Between 1915 and 1916, the districts in the western part of what is now Burkina Faso and the bordering eastern fringe of Mali became the stage of one of the most important armed oppositions to colonial government, known as the Volta-Bani War. The French government finally suppressed the movement, but only after suffering defeats and being forced to gather the largest expeditionary force of its colonial history up to that point. Armed opposition also wracked the Sahelian north when the Tuareg and allied groups of the Dori region ended their truce with the government.
French Upper Volta was established on 1 March 1919. This move was a result of French fears of the recurrence of armed uprising along with economic considerations, and to bolster its administration, the colonial government separated the present territory of Burkina Faso from Upper Senegal and Niger. The new colony was named Haute Volta and François Charles Alexis Édouard Hesling became its first governor. Hesling initiated an ambitious road-making program and promoted the growth of cotton for export. The cotton policy – based on coercion – failed, and revenue stagnated. The colony was later dismantled on 5 September 1932, being split up between the
