The Lagos Treaty of May 28th 1975 led to the formation of the

The Lagos Treaty of May 28th, 1975 led to the formation of the Economic Community of West African States (ECOWAS). The treaty was signed by the Heads of State and Government of 15 West African countries and provided for the establishment of a regional economic community with the objective of promoting economic integration, development, and cooperation among member states. The Lagos Plan of Action was also adopted as a framework for implementing the treaty, with a focus on promoting self-reliance, food security, industrialization, and the development of human resources in the region. The establishment of ECOWAS has since played a crucial role in promoting regional integration and stability, with its member states collaborating on various economic, political, and security issues. Therefore, the correct answer is Economic Community of West African States (ECOWAS).