| Civilian and Military Power | Sondhaus, Lawrence | Austria, France, Germany, Great Britain, Hungary, Italy, Russian Empire, USA | Power |
| Governments, Parliaments and Parties | Oppelland, Torsten | Austria-Hungary, Belgium, Canada, France, Germany, Great Britain and Ireland, Italy, Japan, Ottoman Empire, Russian Empire, Sweden, USA | Power |
| Labour Movements, Trade Unions and Strikes | Thompson, James | Austria-Hungary, Belgium, France, Germany, Great Britain, Italy, Russian Empire, Switzerland | Home Front |
| Revolutions | Fulwider, Chad R. | Austria-Hungary, Bulgaria, France, Germany, Greece, Italy, Ottoman Empire, Russian Empire | Power |
| Revolutions (East Central Europe) | Brudek, Paweł | Estonia, Finland, Latvia, Lithuania, Poland, Russian Empire | Power |
| Spain | Ponce, Javier | Spain | Home Front, Media, Post-war, Power, Pre-war, Violence |
| The Military Collapse of the Central Powers | Tunstall, Graydon A. | Austria, Czechoslovakia, Germany, Hungary, Italy, Ottoman Empire | Violence |
| United States of America | Keene, Jennifer D. | USA | Home Front, Media, Post-war, Power, Violence |
