Polish October
...that the events of Polish October together with Hungarian November shook the Eastern Bloc in 1956 and set the course for the Revolutions of 1989?
...that the events of <b id="mwCUU"><a href="./Polish_October" id="mwCUY" rel="mw:WikiLink" title="Polish October">Polish October</a></b> together with <a href="./Hungarian_Revolution_of_1956" id="mwCUc" rel="mw:WikiLink" title="Hungarian Revolution of 1956">Hungarian November</a> shook the <a href="./Eastern_Bloc" id="mwCUg" rel="mw:WikiLink" title="Eastern Bloc">Eastern Bloc</a> in 1956 and set the course for the <a href="./Revolutions_of_1989" id="mwCUk" rel="mw:WikiLink" title="Revolutions of 1989">Revolutions of 1989</a>?