West African Economic Community (CEAO)
Note - acronym from Communaute Economique de l'Afrique de l'Ouest
established - 3 June 1972
aim - to promote regional economic development
members - (7) Benin, Burkina, Ivory Coast, Mali, Mauritania, Niger, Senegal
observer - (1) Togo
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Western European Union (WEU)
established - 23 October 1954
effective - 6 May 1955