United States Foreign relations 21 History 13 Politics and government 7 World politics 7 Armed Forces 6 Handbooks, manuals, etc 6 Cold War 4 Encyclopedias 4 Prevention 4 Sources 4 Soviet Union 4 Terrorism 4 Biography 3 Great Britain 3 Military policy 3 National security 3 Arms control 2 Causes 2 Defenses 2 Dictionaries 2 History, Military 2 Human rights 2 Iraq 2 Korea 2 Korea (North) 2 Korea (South) 2 Korea reunification question (1945-) 2 Military relations 2 Periodicals 2