- World War, 1914-1918 + Diplomatic history
- World War, 1914-1918 + Finance
- World War, 1914-1918 + Naval operations, German
- World War, 1914-1918 + War work + Knights of Columbus
- World War, 1914-1918 + Economic aspects
- World War, 1914-1918 + Literature and the war
- World War, 1914-1918 + Peace proposals and settlements
- World War, 1914-1918 + Atrocities
- World War, 1914-1918 + Centennial celebrations, etc
- World War, 1914-1918 + Psychological aspects
- World War, 1914-1918 + Political aspects
- World War, 1914-1918 + Social aspects
- World War, 1914-1918 + Hospitals
- World War, 1914-1918 + War work + Young Women's Christian Association
- Aristocracy (Social class) + World War, 1914-1918
- World War, 1914-1918 + Missing in action
- World War, 1914-1918 + Trench warfare
- World War, 1914-1918 + Armistices
- World War, 1914-1918 + War work
- World War, 1914-1918 + Participation, Mexican American
- World War, 1914-1918 + Anniversaries
- World War, 1914-1918 + Participation, African American
- World War, 1914-1918 + War work + Young Men's Christian Association
- World War, 1914-1918 + Food supply
- World War, 1914-1918 + Aerial operations
- World War, 1914-1918 + War work + Young Men's Christian associations
- World War, 1914-1918 + Secret service
- World War, 1914-1918 + Peace
- World War, 1914-1918 + Regimental histories
- World War, 1914-1918 + Underground movements
- World War, 1914-1918 + Humor, caricatures, etc
- World War, 1914-1918 + Societies, etc
- World War, 1914-1918 + Monuments
- World War, 1914-1918 + Transportation
- World War, 1914-1918 + War work + Red Cross
- World War, 1914-1918 + Aerial operations, British
- World War, 1914-1918 + Women
- World War, 1914-1918 + Causes
- World War, 1914-1918 + Naval operations, American
- World War, 1914-1918 + Italian Americans
- World War, 1914-1918 + Art and the war
- World War, 1914-1918 + Territorial questions
- World War, 1914-1918 + Protest movements
- World War, 1914-1918 + Personal narratives, English
- World War, 1914-1918 + Participation, Female
- World War, 1914-1918 + Catholic Church
- World War, 1914-1918 + Prisoners and prisons
- World War, 1914-1918 + Influence
- World War, 1914-1918 + Prisoners and prisons, German
- World War, 1914-1918 + Communications