History National security Foreign relations 6 Military policy 4 Politics and government 3 Strategy 3 Europe 2 Intervention (International law) 2 Military assistance, American 2 Military doctrine 2 Security, International 2 Air power 1 Biography 1 Civil War 1 Crime prevention 1 Economic integration 1 Economic policy 1 Generals 1 Government policy 1 Intelligence service 1 International relations 1 Kosovo (Serbia) 1 Military art and science 1 National Security Council (U.S.) 1 Non-government organizations 1 North Atlantic Treaty Organization 1 North Atlantic Treaty Organization--Serbia and Montenegro 1 Officers 1 Officials and employees 1 Operation Allied Force 1