In virtual control of the colonial administration, the commercial companies of Saint-Louis sold arms to the Maures, while at the same time outfitting French punitive missions. Scientific expeditions into Mauritania became increasingly subject to attack, and their European leaders were killed or held for ransom. The obvious weakness of the French and their distraction with events elsewhere in the region emboldened the amirs to demand and secure the reinstatement of the coutume.[1]