- World War, 1914-1918 + Refugees
- World War, 1914-1918 + Health aspects
- World War, 1914-1918 + Literature and the war
- World War, 1914-1918 + Aerial operations, French
- World War, 1914-1918 + Chemical warfare
- World War, 1914-1918 + Participation, African American
- World War, 1914-1918 + Diplomatic history
- World War, 1914-1918 + Naval operations
- World War, 1914-1918 + Hospitals
- World War, 1914-1918 + Influence
- World War, 1914-1918 + Prisoners and prisons
- World War, 1914-1918 + Missing in action
- World War, 1914-1918 + Participation, Native American
- World War, 1914-1918 + Prisoners and prisons, German
- World War, 1914-1918 + Social aspects
- World War, 1914-1918 + Psychological aspects
- World War, 1914-1918 + Transportation
- World War, 1914-1918 + Naval operations, British
- World War, 1914-1918 + Underground movements
- World War, 1914-1918 + Camouflage
- World War, 1914-1918 + Conscientious objectors
- World War, 1914-1918 + War work
- World War, 1914-1918 + Communications
- World War, 1914-1918 + Search and rescue operations
- World War, 1914-1918 + History
- World War, 1914-1918 + Public opinion
- World War, 1914-1918 + Moral and ethical aspects
- World War, 1914-1918 + Participation, Female
- World War, 1914-1918 + Veterans + Mental health
- World War, 1914-1918 + Participation, Mexican American
- World War, 1914-1918 + Women
- World War, 1914-1918 + Naval operations, American
- World War, 1914-1918 + Collaborationists
- World War, 1914-1918 + Armistices
- World War, 1914-1918 + Prisoners and prisons, Turkish
- World War, 1914-1918 + Trench warfare
- World War, 1914-1918 + Equipment and supplies
- World War, 1914-1918 + Veterans
- World War, 1914-1918 + African Americans
- World War, 1914-1918 + Campaigns
- World War, 1914-1918 + Medical care
- World War, 1914-1918 + Aerial operations
- World War, 1914-1918 + Causes
- World War, 1914-1918 + Nurses
- World War, 1914-1918 + Regimental histories
- World War, 1914-1918 + Medical care + Women
- World War, 1914-1918 + Concentration camps
- World War, 1914-1918 + Cryptography
- World War, 1914-1918 + Naval operations, German
- World War, 1914-1918 + Economic aspects