By 1887, France, motivated by the search for wealth, had driven inland from its settlements on central Africa's west coast to claim the territory of Oubangui-Chari (present-day Central African Republic). It claimed this area as a zone of French influence, and within two years it occupied part of what is now southern Chad. In the early 1890s, French military expeditions sent to Chad encountered the forces of Rabih az-Zubayr, who had been conducting slave raids (razzias) in southern Chad throughout the 1890s and had sacked the settlements of Bornu, Baguirmi, and Wadai Empire.