Foreign relations 626 History 600 Politics and government 285 United States 279 Biography 262 Military policy 226 Armed Forces 162 Terrorism 144 National security 136 World War, 1939-1945 136 World politics 113 Prevention 94 Campaigns 78 Government policy 78 Presidents 68 Intelligence service 67 Vietnam War, 1961-1975 61 Case studies 59 War on terrorism, 2001- 58 Personal narratives, American 57 Management 56 Relations 54 Social conditions 49 Defenses 47 History, Military 47 Military relations 45 Soldiers 45 Social aspects 43 Congresses 42 Generals 42