The fifth Small Wars Journal—El Centro anthology spans online journal and blog writings for all of 2015 with a thematic focus on narcoterrorism and impunity in the Americas. This anthology is composed of an About SWJ and Foundation section; a memoriam to our friend and colleague, George W. Grayson; an acronym listing; a foreword; an introduction; twenty-eight chapters; a postscript; anthology notes; and notes on its twenty-three academic, governmental, and professional contributors.