The Economic Community of West African States (ECOWAS; also known as CEDEAO in French and Portuguese) is a regional political and economic union of twelve countries of West Africa. Collectively, the present and former members comprise an area of 5,114,162 km (1,974,589 sq mi) and have an estimated population of over 424.34 million.
Considered one of the pillar regional blocs of the continent-wide African Economic Community (AEC), the stated goal of ECOWAS is to achieve "collective self-sufficiency" for its member states by creating a single large trade bloc by building a full economic and trading union. Additionally, ECOWAS aims to raise living standards and promote economic development. The union was established on 28 May 1975, with the signing of the Treaty of Lagos, with its stated mission to promote economic integration across the region. A revised version of the treaty was agreed and signed on 24 July 1993 in Cotonou, the largest city in Benin.