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
French Sudan of growing Egyptian cotton in West Africa during World War I, Émile Bélime began to campaign for the construction of a large irrigation system along the Niger river. Starting in 1921, significant irrigation projects around Koulikoro and later at Baguinéda-Camp and the Ségou Cercle began to bring water. The French believed this project could rival the major cotton growing centers of Egypt and the United States. Unlike other agricultural projects in French West Africa, the French Sudan irrigation project initially relied on families voluntarily resettling along lines established by the colonial authority. Unable to attract enough volunteers, the colonial authorities