Khrushchev was a semi dangerous foreign adventurist though, who almost caused a nuclear armageddon during the Cuban missile crisis in 1962. He also threatened that 'rockets would fly' in 1961 if the western allies would not leave West Berlin.
Brezhnev on the other hand did have a period of detente and good relations with the US. He also signed multiple nuclear arms control agreements with the US that eased cold war tensions.
Actually, detente had been delayed in the mid-to-late 60s by such developments as Vietnam and Czechoslovakia, which he had nothing to do with.
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