World War, 1914-1918 History 514 Foreign relations 150 Politics and government 141 Guerre mondiale, 1914-1918 138 Campaigns 106 Histoire 85 more ... Causes 75 History, Military 59 Social conditions 57 Diplomatic history 56 World War I (1914-1918) 54 International relations 53 Armed Forces 47 Diplomatic relations 47 Military and naval history 45 Military campaigns 43 Generals 38 Economic aspects 35 Soldiers 31 Officers 30 Prisoners of war 30 War 30 Economic conditions 28 History - 20th century 25 History of Russia. Soviet Union. Former Soviet Republics 24 Politique et gouvernement 23 Prisoners and prisons, Russian 23 Relations extérieures 23 World War, 1939-1945 23 less ...