The greatest achievement of nationalist movements in West Africa was the

The greatest achievement of nationalist movements in West Africa was the attainment of independence by member states. This means that after a long period of colonial rule by European powers, the people of West Africa were able to gain control of their own governments and determine their own destinies. This was a significant accomplishment for the people of the region, as it allowed them to establish their own political, economic, and social systems, and to take their place as independent nations on the world stage.