World War, 1914-1918 1,000 History 122 Guerre mondiale, 1914-1918 100 Politics and government 53 Foreign relations 52 Campaigns 51 Economic aspects 47 more ... Regimental histories 47 Causes 45 Atrocities 29 Peace 25 Naval operations 24 Diplomatic history 21 War 21 Finance 20 Diplomatic relations 17 Histoire 17 Germans 16 Military campaigns 16 War work 16 Armed Forces 15 Erster Weltkrieg 15 Territorial questions 15 World War, 1939-1945 15 German Americans 14 Pangermanism 14 Soldiers 14 Women 13 Neutrality 12 Public opinion 12 Civilian relief 11 Reconstruction (1914-1939) 10 World War, 1914-1918--Personal correspondence 10 Campagnes et batailles 9 Defenses 9 Economic conditions 9 Jews 9 Political activity 9 Registers, lists, etc 9 Submarine 9 less ...