As part of the Studies in African Security Team's efforts to enhance the understanding of the African Peace and Security Architecture (APSA), this report outlines Economic Community of Western African States' (ECOWAS) structures for peace and security and achievements in this area. It introduces the policies and frameworks guiding peace and security as well as the progress in implementation in this area. The report focuses on the progress made, track record and challenges ahead for ECOWAS engagement. Some of the inter-state dynamics which affect ECOWAS' commitment to peace and security are reviewed. Specific attention is also given to the current status and challenges ahead for the establishment of the ECOWAS Standby Force. The report closes with a discussion around the role of external donors which support ECOWAS, and explores their potential role in partnerships related to peace and security with the sub-regional body.