David J. Galbreath is Professor of International Security and Director of the Centre for Security and Technology at the University of Bath, UK. He is former Editor-in-Chief of European Security (2009-2015) and Defence Studies (2013-2016), and author of, most recently, The European Minority Rights Regime (2012, with Joanne McEvoy).

John R. Deni is Research Professor of Security Studies at the US Army War College's Strategic Studies Institute and an adjunct lecturer at American University's School of International Service. He is author of NATO and Article 5 (2017).

Introduction, David J. Galbreath and John R. Deni Part I: Defence as Policy 1. Defence as Policy, Trevor Taylor 2. Defence as War, Olivier Schmitt 3. Defence as Security, Hannah E. Dönges and Stephanie C. Hofmann 4. Methods in Defence Studies, Delphine Deschaux-Dutard Part II: Defence Practice 5.Defence Budgets, Keith Hartley 6. Defence Procurement, Matthew Uttley 7. Recruiting and Retention to Sustain a Volunteer Military Force, Beth J. Asch and John T. Warner 8. Professional Military Education, Victoria Syme-Taylor and Duraid Jalili 9. Military Logistics, Mahyar Amouzegar 10. Military Doctrine, Harald Høiback 11. Strategy, Thomas G. Mahnken 12. Defence Strategic Culture: Between Power and Rules, Julian Lindley-French 13. Civil-Military Relations, Birthe Anders Part III: Operations and Tactics 14. Land Warfare, Christopher Tuck 15. Air Warfare, Viktoriya Fedorchak 16. Naval Warfare, Alessio Patalano 17. Insurgency and Counterinsurgency, Celeste Ward Gventer 18. Nuclear Warfare and Deterrence, John Friend and Bradley A. Thayer 19. Cyber Warfare, Chris Bronk 20. Joint Combined Operations, Thomas Drohan 21. Peace Operations and 'no peace to keep', Berma Klein Goldewijk and Joseph Soeters 22. Intelligence, Surveillance and Reconnaissance, Adam D.M. Svendsen Part IV: Contemporary Defence Issues 23. Public Opinion and Defence, Bastian Giegerich 24. The Role of Private Military Corporations in Defence, Mark Erbel and Christopher Kinsey 25. Resilience, Security and Defence, Brett Edwards 26. Military Transformation, Peter Dombrowski 27. Military Robots and Drones, Ulrike Esther Franke 28. Military Alliances, James Sperling 29. Security Assistance, John R. Deni 30. Future War, Manabrata Guha