The Sinatra Doctrine refers to the policy adopted by Soviet leader Mikhail Gorbachev in the late 1980s, which allowed Eastern European countries to determine their own political systems and pursue reforms without direct interference from Moscow. Named after Frank Sinatra's song 'My Way,' this doctrine represented a significant shift from the Brezhnev Doctrine, which emphasized strict Soviet control over its satellite states. It marked a new approach that encouraged independence and political pluralism in Eastern Europe, reshaping the relationship between the Soviet Union and its satellite nations.