I te tau 1968, i te wa i tohua ai te kaiwhakawhanake a Alexander Dubček ki te tūranga matua o te Hekeretari Tuatahi o te Rōpū Communist o Czechoslovak, he wa poto o te whakaoranga e mohiotia ana ko te Spring Prague. Hei whakautu, i muri i te kore o nga kaiarahi o Czechoslovak ki te whakarereke i te huarahi, e rima atu nga mema o te Pae o Warsaw i whakaekea
He aha? I uru mai nga taakahi Soviet ki Czechoslovakia i te po o te 20 ki te 21 o Akuhata 1968. Ko te Hekeretari Matua o te Rōpū Communist o Soviet Leonid Brezhnev i kite i tenei whakauru hei mea nui mo te tiaki i te Soviet, te punaha pāpori me te oati ki te whakauru atu ki tetahi kawanatanga e whai ana ki te whakakapi i te Marxism-Leninism ki te whakapaipai.