"As the United States establishes its strategic priorities to enhance national security, support for peacekeeping is increasingly important. Particularly following the attacks of September 11, 2001, the Pentagon has viewed failed states (also referred to as 'undergoverned' or 'ungoverned spaces') as a threat to U.S. national security. President Barack Obama's restoration of the Cabinet status of his Ambassador to the United Nations (UN), Susan Rice, reflects the administration's recognition of the overall importance of the UN, including its key role in peacekeeping. Over the last 4 years, the Center for Technology and National Security Policy and, since 2008, the Center for Complex Operations at the National Defense University have hosted a unique series of offsite informal discussions designed to facilitate open and frank discussions of what more the United States might do to support burgeoning UN peacekeeping activities. In five sessions, these offthe- record, informal discussions occurred between the UN Department of Peacekeeping Operations (UNDPKO) and Department of Defense (DOD).1 The Department of Field Support (DFS) was added following its creation in 2007, and the State Department began participating at a senior level in 2009. This series was conceived by Hans Binnendijk, director of the Institute for National Security Studies at the National Defense University, and led by Dr. Binnendijk and me. Ambassador James Dobbins, director of the RAND International Security and Defense Policy Center, has served as session moderator."