Krushchev's secret speech was a landmark address delivered by Soviet leader Nikita Krushchev on February 25, 1956, during the 20th Congress of the Communist Party of the Soviet Union. In this speech, he denounced the policies and legacy of Joseph Stalin, exposing the extent of Stalin's repressive regime and its impact on the Soviet Union and the Communist movement. This speech played a crucial role in the context of the Cold War as it sparked de-Stalinization and encouraged reformist movements across Eastern Europe.