This article examines the role of regional arrangements under the Charter of the United Nations (UN Charter) in the maintenance of international peace and security. The African Union Peace and Security Council (AU PSC), the organ within the AU charged with addressing threats to international peace and security on the African continent, is used as a case study. The author contends that the major challenges facing regional arrangements in exercising mandates under Article 53 of the UN Charter of the United Nations have more to do with inadequate financial and logistical resources than the nature of those mandates. Taking the AU’s role in Somalia, Sudan, and other African countries as examples, the article demonstrates that the AU PSC has failed to achieve its objective of maintaining peace and security precisely because the United Nations (UN) Security Council — a more powerful and better resourced organ — has failed to live up to its responsibility of extending the assistance necessary to enable the AU PSC to perform its functions. Consequently, the author concludes that the UN Security Council, when delegating powers to regional arrangements to maintain international peace and security, should provide adequate resources to such regional arrangements, especially those that will otherwise have minimal or no capacity to fulfil their mandate effectively.