This manual is designed to support the Joint Special Operations University's educational mission and in particular its series of SOF Interagency courses. The volume was compiled to provide a valuable reference work for JSOU students, SOF staff officers, and partners in the interagency process. The manual provides insight and information regarding various counterterrorism players in the U.S. Government national security apparatus. While not all inclusive, this manual provides an outline of organizations, missions, and relationships that comprise the interagency process.