History 355 Foreign relations 326 United States 196 Biography 157 Politics and government 114 Military policy 104 Armed Forces 100 World War, 1939-1945 85 Terrorism 84 National security 78 Thesis 65 Dissertations, Academic 53 Presidents 47 World politics 46 Prevention 45 Government policy 40 Management 39 Campaigns 37 Case studies 37 Leadership 33 War on terrorism, 2001- 33 Handbooks, manuals, etc 32 Intelligence service 32 Juvenile literature 32 History, Military 30 Army 29 Civil War, 1861-1865 29 Education 29 Generals 27 Military art and science 27