 Le bassin de la Sarre. Exegesis of an equivocal work by Paul Vidal de la Blache and Lucien Gallois 
Shortly after the Great War, Paul Vidal de la Blache and Lucien Gallois authored Le bassin de la Sarre. Clauses du traité de Versailles. Étude historique et économique. This paper explores the context in which Le bassin de la Sarre was written and published. A bibliological analysis shows the evolution of its textual and iconographic corpus from its first formulation within the Comité d’études, created in 1917 to define France’s war goals. It turns out that the book, while displaying the neutrality proper to science, is strongly connected to the Treaty of Versailles, signed on June 28, 1919, by supporting France’s position about this contested region.