For the United States, asymmetric warfare has emerged as the ‘;new normal.’ The large-scale conventional campaigns that typified U.S. military engagements for much of the 20th Century are increasingly things of the past. Instead, the quarter-century since the end of the Cold War and the collapse of the U.S.-Soviet balance of power has seen irregular war truly come of age, with more and more hostile nations pursuing asymmetric means in order to secure the strategic advantage vis–vis the United States. In this volume, a group of leading national security practitioners and subject matter experts comes together to analyze the asymmetric strategies being pursued today by America’s main state-based adversaries Russia, China, Iran and North Koreaand to explore how U.S. policymakers can respond more effectively to them.