<prompt> Pedzisa mutsara unotevera: Muusiku hwaAugust 20-21, 1968, mauto eEastern Bloc anobva kunyika shanu dzeWarsaw Pact Soviet Union, Poland, East Germany, Hungary neBulgaria  <response>: vakapinda muCzechoslovakia. Kupinda kwacho kwakabvumirana neBrejnev Doctrine, mutemo wokumanikidza nyika dzeEastern Bloc kuti dziite kuti zvido zvenyika dzadzo zvive pasi pezviya zveEastern Bloc yose zvayo uye kushandisa kodzero yeSoviet yokupindira kana imwe nyika yeEastern Bloc ikaita seiri kutendeukira kuhutongi hwehupfumi. Kupinda kwakateverwa nemafungu okubuda munyika, kubatanidza vanofungidzirwa kuva maCzechoslovaks 70 000 vakatanga kutiza, nehuwandu hwakazosvika 300 000. 