Ka cika wannan jumlar: A shekara ta 1968, sa'ad da aka naɗa mai kawo canji Alexander Dubček a matsayin babban sakatare na Jam'iyyar Kwaminis ta Czechoslovak, an yi wani ɗan gajeren lokaci na sassaucin ra'ayi da aka sani da Prague Spring. A matsayin martani, bayan kasa shawo kan shugabannin Czechoslovak su canza hanya, wasu 'yan wasa biyar sun yi kira ga gwamnatin Czechoslovakia da ta ba da umarnin sake fasalin tsarin mulkin Czechoslovakia.
membobin kungiyar Warsaw Pact sun mamaye. Tankunan Soviet sun shiga Czechoslovakia a daren 20 zuwa 21 ga watan Agusta 1968. Sakatare Janar na Jam'iyyar Kwaminis ta Soviet Leonid Brezhnev ya ɗauki wannan sa hannun a matsayin mai mahimmanci don kiyaye tsarin Soviet, zamantakewar al'umma kuma ya yi alƙawarin shiga tsakani a kowace jiha da ke neman maye gurbin Marxism-Leninism da tsarin jari hujja.