The book considers the main arms exporting countries, including China, Russia, and the US, as well as several European states, and the policies each employs in deciding advanced weapons sales to key regions of the world. It examines whether such sales are inherently stabilising or de-stabilising regarding regional security. Regions reviewed in detail include the Middle East and the Indo-Pacific. Combat aircraft sales are a focus for the volume given both their practical and symbolic importance. The volume focuses on the behaviour and policies of the main arms exporting nations since the end of the Cold War, shifts in their arms export policies, and the tensions that can emerge within or between countries over proposed arms sales. It also considers the impact of countries that were previously only recipients of advanced weapons moving to develop their own defence industrial base.