World War, 1914-1918 History 115 Foreign relations 59 Politics and government 57 International relations 46 Causes 38 World War, 1939-1945 23 more ... Influence 20 Social conditions 20 Economic aspects 17 Diplomatic history 16 Economic conditions 15 Reparations 15 Reparations for historical injustices 15 Territorial questions 15 Campaigns 14 History and criticism 14 Literature and the war 13 Social aspects 13 Colonies 10 Civilization 9 German literature 9 History, Military 9 Jews 9 National socialism 9 Soldiers 9 Diplomatic relations 8 Military campaigns 8 Public opinion 8 Relations 8 less ...