Feb 1956: Krushchev leader of USSR, to use diplomacy
June 1956: Hungarians protest against Ratski, USSR agrees to Liberal Nagy to reform Hungary
1 Nov 1956: Nagy announces reforms, Hungary to leave Warsaw Pact
4 Nov 1956: USSR invade Hungary, 20,000 Hungarians killed, West does not respond for help
10 Nov 1956: USSR regain control, ceasefire, pro-communist government set up under Janos Kadar
July 1958: Nagy executed, Krushchev describes his death as "lesson to leaders of socialist countries"