| United States -- Foreign relations -- 20th century. Matches 102 items |
| United States -- Foreign relations -- 20th century -- Decision making. Matches 2 items |
| United States -- Foreign relations -- 20th century -- Moral and ethical aspects. Matches 1 item |
| United States -- Foreign relations -- 20th century -- Philosophy. Matches 1 item |
| United States -- Foreign relations -- 20th century -- Pictorial works. Matches 1 item |
| United States -- Foreign relations -- 20th century -- Psychological aspects. Matches 1 item |
| United States -- Foreign relations -- 20th century -- Sources. Matches 1 item |
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United States -- Foreign relations -- 21st century. Matches 19 items See Also: War on Terrorism, 2001-2009. Matches 80 items
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| United States -- Foreign relations -- 21st century -- Case studies. Matches 1 item |
| United States -- Foreign relations -- 21st century -- Forecasting. Matches 2 items |