World politics Foreign relations 112 International relations 77 Military policy 53 History 49 National security 37 Security, International 32 Cold War 29 War 25 Politics and government 24 Terrorism 24 United States 24 Armed Forces 15 Forecasting 15 Military art and science 14 September 11 Terrorist Attacks, 2001 13 Strategy 13 Military history, Modern 12 War on terrorism, 2001- 12 Geopolitics 11 Nuclear weapons 11 Political aspects 11 Defenses 10 Globalization 10 Economic history 9 Influence 9 International economic relations 9 War (International law) 9 Arms race 8 Congresses 8