- World War, 1914-1918 + Press coverage
- World War, 1914-1918 + Civilian relief
- World War, 1914-1918 + Diplomatic history
- World War, 1914-1918 + Naval operations
- World War, 1914-1918 + Motion pictures and the war
- World War, 1914-1918 + Trench warfare
- World War, 1914-1918 + Collaborationists
- World War, 1914-1918 + Prisoners and prisons, Turkish
- World War, 1914-1918 + Cryptography
- World War, 1914-1918 + Economic aspects
- World War, 1914-1918 + Political aspects
- World War, 1914-1918 + War work + Women
- World War, 1914-1918 + Health aspects
- World War, 1914-1918 + Literature and the war
- World War, 1914-1918 + Refugees
- World War, 1914-1918 + Chemical warfare
- World War, 1914-1918 + Missing in action
- World War, 1914-1918 + Hospitals
- World War, 1914-1918 + Atrocities
- World War, 1914-1918 + War work
- World War, 1914-1918 + Participation, African American
- World War, 1914-1918 + Personal narratives, Austrian
- World War, 1914-1918 + Battlefields
- World War, 1914-1918 + Veterans + Mental health
- World War, 1914-1918 + Participation, Mexican American
- World War, 1914-1918 + Peace
- World War, 1914-1918 + Science
- World War, 1914-1918 + Aerial operations
- World War, 1914-1918 + Regimental histories
- World War, 1914-1918 + Equipment and supplies
- World War, 1914-1918 + Underground movements
- World War, 1914-1918 + Monuments
- World War, 1914-1918 + Jews
- World War, 1914-1918 + Military intelligence
- World War, 1914-1918 + Aerial operations, French
- World War, 1914-1918 + Medical care + Women
- World War, 1914-1918 + Dogs
- World War, 1914-1918 + Naval operations, American
- World War, 1914-1918 + Museums
- World War, 1914-1918 + Prisoners and prisons, German
- World War, 1914-1918 + Prisoners and prisons
- World War, 1914-1918 + Transportation
- World War, 1914-1918 + Naval operations + Submarine
- World War, 1914-1918 + African Americans
- World War, 1914-1918 + Communications
- World War, 1914-1918 + Participation, East Indian
- World War, 1914-1918 + Participation, Female
- World War, 1914-1918 + Peace + History
- World War, 1914-1918 + Protest movements
- World War, 1914-1918 + Libraries