Foreign relations 240 History 109 Politics and government 105 Military policy 57 Biography 43 World politics 39 Armed Forces 38 Vietnam War, 1961-1975 37 National security 25 Defenses 21 Relations 20 Terrorism 19 World War, 1939-1945 17 Generals 16 War on terrorism, 2001- 16 Congresses 15 Presidents 15 Campaigns 14 Government policy 14 Intelligence service 14 International relations 14 Foreign economic relations 12 Personal narratives, American 12 Social conditions 11 Army 10 September 11 Terrorist Attacks, 2001 10 Soldiers 10 Addresses, essays, lectures 9 Cold War 9 Economic conditions 9