The **Economic Community of West African States (ECOWAS)** was established on 28 May 1975. This establishment happened when a treaty was signed in Lagos, Nigeria, by the Heads of State and Government of 15 West African countries. The primary goal of ECOWAS is to promote economic integration and cooperation among its member states, which includes the free movement of goods, capital, and people, as well as the harmonization of policies and development of a unified economic space in the West African region.