The annual Combat Studies Institute Military History Symposium provides a forum for the interchange of ideas on historical topics pertinent to the current doctrinal concerns of the United States Army. Furthermore, the Symposium solicits input from a diverse group of military personnel, government historians, civilian academicians, journalists and thinkers in a setting that promotes the exchange of ideas and information. The 2007 symposium's theme, "Warfare in the Age of Non-State Actors: Implications for the US Army" explored the challenges associated with conflict between nation states and transnational religious, ethnic, or criminal groups. It examined the historical experiences of both the United States and other nations in this most asymmetric of environments in an attempt to distill the insights from the past can provide us guidance into the future. In addition to the many excellent panelists who presented their research, this year we were fortunate again to have a number very distinguished featured speakers. Representative Ike Skelton IV and General (Retired) Barry R. McCaffrey not only addressed the symposium, but the entire student body of the Command and General Staff College. Lieutenant General William B. Caldwell IV, Commanding General of the Combined Arms Center at Fort Leavenworth shared his recent experience in Iraq as the Director of Strategic Effects for Multination Forces-Iraq. These proceedings contain the papers and presentations of all the speakers and panelists, as well as the transcriptions of selected question and answer periods following the presentations. These annual symposia continue to be an important event, for the past has much to offer in the analysis of contemporary military challenges. The Army also continues to derive many important insights from non-military historians and thinkers who add to the Army's own historical efforts.