Émile Gentil, a French military commander, founded Fort-Lamy in Chad during a period of significant colonial expansion in Africa. Situated at the strategic intersection of the Chari and Logone rivers, Fort-Lamy was intended to serve as a military outpost and a base for further French expansion into the region. The establishment of the fort was part of broader French efforts to solidify their territories in Central Africa, combating both local resistance and European competition for influence. The fort was named in honor of General Paul Lamy, acknowledging his contributions to French colonial endeavors.

The founding of Fort-Lamy came at a time when various European powers were vying for control of African territories, often leading to tensions and conflicts. By establishing a stronghold in the area, France sought to enhance its military, economic, and political influence over the region. The fort became a crucial point for operations in Chad and was integral to France’s attempts to maintain its power in West and Central Africa. Eventually, the location would evolve into what is now the capital of Chad, N'Djamena, reflecting the fort's lasting significance in the area's political landscape.

Through Fort-Lamy, the French were able to establish trade routes and reinforce their economic interests, linking them to other parts of their colonial empire. The fort not only enabled France to project its military power but also facilitated the imposition of French administrative control and the spread of culture and influence in the region. Its establishment marked a pivotal moment for French colonial strategy, laying the groundwork for future developments in Chad and neighboring countries.