2Since the end of the Cold War the United States and other major powers have wielded their air forces against much weaker state and non-state actors. In this age of primacy, air wars have been contests between unequals and characterized by asymmetries of power, interest, and technology. This volume examines ten contemporary wars where air power played a major and at times decisive role. Its chapters explore the evolving use of unmanned aircraft against global terrorist organizations as well as more conventional air conflicts in Bosnia, Kosovo, Afghanistan, Iraq, Lebanon, Libya, Yemen, Syria, and against ISIS. Air superiority could be assumed in this unique and brief period where the international system was largely absent great power competition. However, the reliable and unchallenged employment of a spectrum of manned and unmanned technologies permitted in the age of primacy may not prove effective in future conflicts.