Foreign relations 741 History 691 Biography 324 Politics and government 316 United States 311 Military policy 257 Armed Forces 195 National security 165 World War, 1939-1945 162 Terrorism 159 World politics 121 Prevention 104 Campaigns 93 Presidents 91 Government policy 83 Intelligence service 74 Case studies 71 Juvenile literature 67 Management 66 Thesis 65 War on terrorism, 2001- 64 Relations 63 Vietnam War, 1961-1975 62 Personal narratives, American 59 History, Military 58 Army 54 Dissertations, Academic 53 Military relations 53 Handbooks, manuals, etc 51 Social conditions 51