Events of the Prague Spring
1. Czech students began peacefully demonstrating against Novotny's rule
2. Novotny asked Brezhnev for help to crackdown on the protests, but Brezhnev refused
3. Novotny was replaced as Communist Party Secretary by Alexander Dubcek
4. Dubcek announced an Action Plan to deliver 'Socialism with a Human Face'
5. Dubcek's reforms began to worry the Soviets
6. Brezhnev declared the USSR would not allow the countries of Eastern Europe to reject communism
7. Brezhnev sent an invasion force of 500,000 troops from Warsaw Pact countries into Czechoslovakia
8. Czechs employed peaceful protest tactics
9. Dubcek was arrested and taken to Moscow, Gustav Husak was installed as the Czech leader