The Cyber Defense Review (CDR) journal is a scholarly effort from the Army Cyber Institute (ACI) at West Point. The CDR generates an intellectual multidisciplinary dialogue through thought provoking scholarly articles and essays on the strategic, operational, and tactical aspects of the cyber domain. The CDR breaks down barriers and fosters innovative solutions to global cybersecurity challenges. The CDR compiles perspectives from preeminent thinkers across the government, industry, and academia regarding potential challenges, impacts, and initiatives for consideration as we solve over-the-horizon problems for the Army and the Nation.