| Atrocities | Kramer, Alan | Austria, Belgium, France, Germany, Great Britain, Ottoman Empire, Serbia, Ukraine | Violence |
| Centenary (Historiography) | Dülffer, Jost | Africa, China, France, Germany, Great Britain, Japan, Ottoman Empire, Poland, USA | Post-war |
| Domestic Politics and Neutrality (Switzerland) | Moos, Carlo | Switzerland | Power |
| Espionage | Debruyne, Emmanuel | Austria-Hungary, Belgium, France, Germany, Great Britain, Ireland, Italy, Russian Empire, Serbia, The Netherlands, USA | Violence |
| Forced Labour | Thiel, Jens and Westerhoff, Christian | Austria-Hungary, Belgium, France, Germany, Poland, Russian Empire | Violence |
| Foreign Policy (Sweden) | Åselius, Gunnar | Sweden | Power |
| International Committee of the Red Cross | Herrmann, Irène and Palmieri, Daniel | Switzerland | Home Front, Post-war, Power, Pre-war, Violence |
| International Labour Organization | Ziegerhofer, Anita | Belgium, Czechoslovakia, France, Great Britain, Italy, Japan, Poland, USA | Home Front, Post-war, Power |
| International Law and the Laws of War | Quataert, Jean H. | Austria-Hungary, Belgium, Central America and Caribbean, China, France, Germany, Great Britain, Italy, Japan, Ottoman Empire, Russian Empire, South America, Switzerland, The Netherlands, USA | Pre-war |
| Internees (Switzerland) | Bürgisser, Thomas | Switzerland | Violence |
| Internment (Canada) | Avery, Donald H. | Canada | Violence |
| Making Sense of the War | Fox, Jo | Belgium, France, Germany, Great Britain | Media |
| Making Sense of the War (Great Britain and Ireland) | Pennell, Catriona | Great Britain, Ireland | Media |
| Making Sense of the War (The Netherlands) | Brolsma, Marjet | The Netherlands | Media |
| Naval Blockade (of Germany) | Kramer, Alan | Germany | Home Front, Power, Violence |
| Negotiating and Mediating Conduct of War | Stibbe, Matthew | Austria-Hungary, Belgium, China, East and Central Africa, France, Germany, Great Britain, Italy, Japan, Northern Africa, Ottoman Empire, Russian Empire, Spain, Sweden, Switzerland, The Netherlands, USA, West Africa | Violence |
| Norway | Haug, Karl Erik | Norway | Home Front, Media, Power, Violence |
| Occupation during and after the War (Germany) | Schröder, Joachim and Watson, Alexander | Germany | Post-war, Power |
| Occupation during and after the War (Italy) | Ermacora, Matteo | Italy | Post-war, Power |
| Occupation during the War | Corni, Gustavo | Albania, Austria-Hungary, Belgium, Bulgaria, France, Germany, Italy, Latvia, Lithuania, Montenegro, Poland, Romania, Serbia | Power |
| Occupation during the War (Belgium and France) | Wegner, Larissa | Belgium, France | Power |
| Othering/Atrocity Propaganda | Bruendel, Steffen | Austria-Hungary, France, Germany, Great Britain, Russian Empire, USA | Media |
| Post-war Treaties (Ottoman Empire/ Middle East) | Smith, Leonard V. | Ottoman Empire | Post-war |
| Pre-war Military Planning | Seligmann, Matthew S. | Austria-Hungary, France, Germany, Great Britain and Ireland | Pre-war |
| Prisoners of War | Jones, Heather | Austria-Hungary, Bulgaria, France, Germany, Great Britain, Italy, Ottoman Empire, Russian Empire, Serbia | Violence |
| Prisoners of War and Internees (Great Britain) | Panayi, Panikos | Great Britain, Ireland | Violence |
| Prisoners of War (Australia) | Pegram, Aaron | Australia | Violence |
| Prisoners of War (Belgium and France) | Jones, Heather | Belgium, France | Violence |
| Prisoners of War (Germany) | Jones, Heather and Hinz, Uta | Germany | Violence |
| Red Cross | Cotter, Cédric | Austria-Hungary, Denmark, France, Germany, Great Britain, Russian Empire, Sweden, Switzerland, USA | Home Front |
| Sea Transport and Supply | Miller B., Michael | France, Germany, Great Britain, India, Italy, Norway, USA | Home Front |
| Social Costs of War | Redding, Kimberly A. | Austria-Hungary, Belarus, Belgium, France, Germany, Great Britain, Italy, Ottoman Empire, Poland, Serbia, The Netherlands, USA, Ukraine | Home Front |
| The Netherlands | Kruizinga, Samuël, Moeyes, Paul and Klinkert, Wim | The Netherlands | Media, Post-war, Power, Pre-war, Violence |
| War Aims and War Aims Discussions (Australia) | Beaumont, Joan | Australia | Power |
| Wartime and Post-war Societies (The Netherlands) | Kristel, Conny | The Netherlands | Home Front |
