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- Foreign relations[remove]619
- Vietnam War, 1961-1975618
- Politics and government116
- Missing in action109
- History103
- Diplomatic history57
- Peace37
- Prisoners and prisons36
- Prisoners and prisons, North Vietnamese34
- Diplomatic relations33
- Influence33
- Johnson, Lyndon B. (Lyndon Baines), 1908-197331
- Public opinion29
- Vietnam War (1961-1975)27
- Causes24
- Military policy22
- National security18
- Decision making17
- Presidents15
- Kennedy, John F. (John Fitzgerald), 1917-196314