This paper assess and evaluates the ECOWAS peacekeeping efforts in West Africa, specifically its successes and failures in Liberia, Sierrra Leone, Cote d’Ivoire, Guinea and Guinea Bissau, using a simplified version of the evaluative framework created by Diehl and Druckman, to accommodate for the type of data that is available for these operations. The paper demonstrates that ECOWAS failed to restore peace and security in all its peacekeeping operations and that there is a lot that the sub-regional organization has to learn to deal effectively with its own conflicts. Nigeria provided most of the financial support and troops for the operations in Liberia, Sierra Leone and Cote d’Ivoire, but decided to play a more limited role in the ECOWAS interventions in Guinea and Guinea-Bissau after being severely criticized for its hegemonic role by several ECOWAS members. ECOWAS might be able to play an important role in preserving the security of the region, but only after learning from its mistakes in past operations.