French military officers and the mapping of West Africa: the case of Captain Brosselard-Faidherbe

Through the study of projects conceived to shape colonial space, this article aims to reconsider the motives and means of French colonial expansion in West Africa in the 1880s and 1890s. The Plan Faidherbe, designed by the Governor of Senegal in the 1860s, outlined a plan for eastward development, including a road and rail link between the Senegal and the Niger Rivers (and beyond, between Algeria and Sudan). The implementation of these routes of penetration called for a number of military-led topographic missions. The study of these missions and of the maps that were produced at the time reveal how such projects and their implementation were mediated by both cartographic and field practices. The case of Captain Henry Brosselard (1855-93), General Faidherbe’s son-in-law, is an interesting example because of the diversity of the missions he led and the extent of territory which he traversed and mapped. This case also shows how, in the course of a career, an officer could assume several different functions and come to conceive the process of building colonial territory from different perspectives. This paper questions a common view of the military as having a purely strategic vision of space as a field of conquest, a view which reserves a more development-oriented outlook for civil administrators and the business community. Indeed, Brosselard’s varied career somewhat blurs the conventional divide between civilians and soldiers, requiring us to reconsider accepted ways of categorising colonial actors.