History 28 Foreign relations 15 World War, 1939-1945 13 Military policy 12 National security 11 Campaigns 9 Defenses 8 Politics and government 8 Islam 7 Armed Forces 6 Congresses 6 Europe 6 Military art and science 6 North Atlantic Treaty Organization 6 Security, International 5 World politics 5 International relations 4 Relations 4 Battles 3 Civilization 3 Defences 3 Economic conditions 3 History, Military 3 Islamic countries 3 Islamic fundamentalism 3 Prevention 3 Terrorism 3 World war, 1939-1945 3 Z1 3 20th century 2