Terrorism Prevention 27 National security 10 Military policy 9 Civil defense 6 Counterinsurgency 6 Insurgency 6 more ... History 5 Emergency management 4 Government policy 4 Moral and ethical aspects 4 Weapons of mass destruction 4 Armed Forces 3 Just war doctrine 3 Military art and science 3 Security measures 3 War 3 War on Terrorism, 2001-2009 3 World politics 3 Air power 2 Asymmetric warfare 2 Evaluation 2 Foreign relations 2 Information warfare 2 Jihad 2 Low-intensity conflicts (Military science) 2 Military ethics 2 Military relations 2 Paramilitary forces 2 Political violence 2 less ...