 Nyorai kupfuurira kweiyi ndima - Muna 1939, mazuva 17 pashure pokupinda kweGermany, Soviet Union yakapindawo muPoland. Kwakanga kusina kuzivisa hondo kwomuitiro kunorumwe rutivi norumwe. Hurumende yePoland iri muutapwa yakaiswa muLondon yakaramba ichikurukura nevamiririri vayo muPoland yakatorwa, Polish Underground State. Muna 1943 pashure pokuziviswa kwokupondwa kwevanhu muKatyn uye kusimbirira kwehurumende yePoland pakuferefeta, Soviet Union yakagura ukama hwekudyidzana nehurumende yePoland muLondon, ichivavarira kugadza chimiro chesimba chinokwikwidzana. 