The history of Africa cannot be complete without talking about colonialism. Indeed, the written history of Africa by Western scholars almost always begins with colonialism. Achieving independence therefore represents a very important stage for Africa. Since independence, however, Africa has experienced both interstate and intrastate conflicts to which various resolution mechanisms have been applied. This paper discusses the role of the African regional organization in peace and security. The Economic Organization of West African States (ECOWAS) is used as a case study to illustrate that “a regional Third World organization can lead a peace enforcement process and achieve relative peace despite neglect by great powers” ​​(Bolaji, 2011). IntroductionThe purpose of this article is to discuss the role of African regional organizations in peace and conflict. Before doing so, it is imperative to discuss why conflict occurs on the continent, which necessitates interventions to build or strengthen peace processes in which regional organizations then have a role to play. Conflict usually occurs due to a clash of interests in any relationship between parties or groups, as they may pursue incompatible goals. The word "war", used synonymously with conflict, has been used to refer to violent conflicts involving armed forces, but the post-Cold War era has seen the rise of "new wars" that Mary Kaldor writes about in great detail detail. Throughout human history, conflicts have occurred and Oyeniyi (2011) argues that this is a normal way of conducting disputes between political groups regarding human security. David Weeks (1993) in Oyeniyi (2011) postulates that conflict is an inevitable outcome of human diversity and a conflict-free world…… half of the paper…… Management and resolution, maintaining peace and security Bolaji (2011) argues that l 'ECOWAS has led a revolution by demonstrating that a third world regional organization can lead a peace enforcement process and achieve relative peace despite the negligence of the great powers. He cites ECOMOG's intervention in Liberia, Sierra Leone and Guinea Bissau. He notes, however, that it is important to place emphasis on the development of preventive diplomacy as the results of such diplomacy in previous interventions have been modest. Its effectiveness has been hampered by inadequacies and insufficient institutional support from the ECOWAS commission, leading to the resurgence of crises in some member states and the collapse of post-conflict states into instability and conflict. Liberia serves as an example of this topic as ECOMOG, after intervening in the period 1989-1996, had to intervene again in 1999 to 2003.