- World War, 1914-1918 + Naval operations, German
- World War, 1914-1918 + Deportations from Poland
- World War, 1914-1918 + Economic aspects
- World War, 1914-1918 + Chemical warfare
- World War, 1914-1918 + Social aspects
- World War, 1914-1918 + Hospitals
- Aristocracy (Social class) + World War, 1914-1918
- World War, 1914-1918 + Missing in action
- World War, 1914-1918 + Naval operations, British
- World War, 1914-1918 + Psychological aspects
- World War, 1914-1918 + History
- World War, 1914-1918 + Trench warfare
- World War, 1914-1918 + Collaborationists
- World War, 1914-1918 + Armistices
- World War, 1914-1918 + Prisoners and prisons, Turkish
- World War, 1914-1918 + Motion pictures and the war
- World War, 1914-1918 + Diplomatic history
- World War, 1914-1918 + War work
- World War, 1914-1918 + Press coverage
- World War, 1914-1918 + Participation, African American
- World War, 1914-1918 + Battlefields
- World War, 1914-1918 + Secret service
- World War, 1914-1918 + Peace
- World War, 1914-1918 + Moral and ethical aspects
- World War, 1914-1918 + Participation, Mexican American
- World War, 1914-1918 + Military intelligence
- World War, 1914-1918 + Naval operations + Submarine
- World War, 1914-1918 + Prisoners and prisons, British
- World War, 1914-1918 + Regimental histories
- World War, 1914-1918 + Underground movements
- World War, 1914-1918 + Camouflage
- World War, 1914-1918 + Casualties
- World War, 1914-1918 + Aerial operations
- World War, 1914-1918 + Campaigns
- World War, 1914-1918 + Protest movements
- World War, 1914-1918 + Communications
- World War, 1914-1918 + Transport of sick and wounded
- World War, 1914-1918 + Aerial operations, French
- World War, 1914-1918 + Art and the war
- World War, 1914-1918 + Prisoners and prisons
- World War, 1914-1918 + Influence
- World War, 1914-1918 + Prisoners and prisons, German
- World War, 1914-1918 + Participation, Female
- World War, 1914-1918 + Veterans
- World War, 1914-1918 + Nurses
- World War, 1914-1918 + Women
- World War, 1914-1918 + Causes
- World War, 1914-1918 + Medical care
- World War, 1914-1918 + Religious aspects
- World War, 1914-1918 + Religious aspects + Christianity