French West Africa with the exception of the Senegalese Communes, the administrative structure of French rule at the lower levels remained constant, based upon the Cercle system. This was the smallest unit of French political administration in French colonial Africa that was headed by a European officer. They might range in size, but French Sudan (modern Mali) consisted of less than a dozen Cercles for most of its existence. Thus, a Cercle Commander might be the absolute authority over hundreds of thousands of Africans. A Cercle consisted of several cantons, each of which in turn consisted of several villages, and was almost universal
Colonial Mauritania had been created in 1895, Mauritania was closely tied to its administrative structure and had its annual budget appended to that of the AOF. On December 4, 1920, by a decree of the Colonial Ministry in Paris, Mauritania was officially included in the AOF with the six other French West African territories—Senegal, the French Sudan, Guinea, Côte d'Ivoire, Dahomey (present-day Benin), and Niger. The AOF was organized pyramidally under a centralized federal structure in Dakar. Directly appointed by the president of the French Republic, the governor general of the AOF came to have a great deal of power because of