Complex sentence: United States relations are the international relations between Angola and the United States these relations were tense during the Angolan Civil War when the U.S. government backed UNITA rebels, but have warmed since the Angolan government renounced Marxism in 1992.
Split into simpler sentences: United States relations are the international relations between Angola and the United States. These relations were tense during the Angolan Civil War when the U.S. government backed UNITA rebels, but have warmed since the Angolan government renounced Marxism in 1992.