In the wake of the war of 1914-1918, Professor E. Perrot and Dr A. Yersin were concerned with providing various territories of the French empire with sufficient cinchona resources to fight off malaria. This aim was particularly important in case of a conflict which could impede the supply of quinine due to the quasi-monopoly held by the Netherlands with their overseas possessions in Indonesia. Beginning with documents, in particular the correspondence held by the Museum of Materia Medica at the Faculty of Pharmacy in Paris, an attempt is made to illustrate the policy carried out with difficulty by Perrot and Yersin.