Answer:
The uprising of East Germany in 1953;
More than 50,000 employees demonstrated in soviet however, the army attacked them and ended the protest
The revolution of the Hungarian in 1956;
When Imre Nagy took over power, he tried to introduce new reforms however the red army crushed his changes, and because of this he was executed
1908 Prague spring;
Alexander Dubcek introduced it after he had gained power and brought he democratic reforms; however, the soviet sent troop that ended his democratic reforms.