<prompt> Bhala ukuqhubeka kwalesi sigaba - Ngo-1968, ngemva kwePrague Spring, izwe lahlaselwa  <response>: amabutho aseWarsaw Pact iPeoples Republic of Bulgaria, iPeoples Republic of Hungary, iPeoples Republic of Poland, neSoviet Union, ngaphandle kweSocialist Republic of Romania kanye nePeoples Socialist Republic of Albania ngo-1968, aqeda inkathi yenkululeko ngaphansi kobuholi buka-Alexander Dubček. Kwabulawa izakhamuzi zaseCzechoslovakia ezingu-137 kwathi ezingu-500 zalimala kanzima phakathi nalokhu kuhlasela. 