The third edition of What is Military History? has been thoroughly updated, and includes a new bibliography and new case studies on naval warfare and the origins of war, as well as expanded sections on historiography, environmental history and world history. This popular textbook showcases a field that encompasses not only accounts of campaigns and battles, but includes a wide range of perspectives on all aspects of past military organization and activity. Its global and comparative analysis covers: the history of military history, showing how it has developed from ancient times to the present; the key ideas and concepts that shape analysis of military activity; the current controversies about which military historians argue, and why they are important; a survey of who does military history, where it is taught and published, and how it is practiced; and a look at where military history is headed in the future. Ideal for any interested reader and for classes in military history and in historiography generally, the third edition of this popular book thoroughly explains the dynamics of this rich and growing area of study.