• 3 Vietnam War, 1961-1975
• 2 Foreign relations
• 1 20th century
• 1 Casualties
• 1 Cold War
• 1 Kissinger, Henry, 1923-2023
• 1 Military policy
• 1 Missing in action
• 1 Nixon, Richard M. (Richard Milhous), 1913-1994
• 1 Peace
• 1 United States

• 1 China
• 1 Russia

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