Foreign relations World War, 1914-1918 Diplomatic history 60 History 60 Causes 45 Politics and government 45 Peace 17 more ... Influence 15 World War, 1939-1945 13 Neutrality 11 Territorial questions 9 Campaigns 8 World politics 7 Geopolitics 5 Imperialism 5 Diplomats 4 National security 4 Civilization 3 Defenses 3 Economic policy 3 Ethnic relations 3 Political aspects 3 Self-determination, National 3 Territorial expansion 3 Alliances 2 Cold War 2 Communication in politics 2 Communication, International 2 Communications 2 Cultural assimilation 2 less ...