This volume explores the evolution of United Nations efforts at peacekeeping, particularly since the early 1990s. Peacekeeping has always been one of the most visible symbols of the UN role in international peace and security. And it was disappointment with the performance of UN peacekeeping operations which was to become symbolic of the UN's failure to emerge from the ashes of the Cold War as a rejuvenated key player in international and, increasingly, internal peace and security.