History of United States foreign policy

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History of United States foreign policy is a brief overview of major trends regarding the foreign policy of the United States from the American Revolution to the present. The major themes are becoming an "Empire of Liberty", promoting democracy, expanding across the continent, supporting liberal internationalism, contesting World Wars and the Cold War, fighting international terrorism, developing the Third World, and building a strong world economy with low tariffs (but high tariffs in 1861-1933).