Musi wa1 Gunyana 1939, Germany yakapinda muPoland, ichitanga Hondo Yenyika II muEurope, uye musi wa17 Gunyana, zvichienderana neMolotov-Ribbentrop Chibvumirano, Poland yakapinda neSoviet Union. Zvadaro, Poland yakakamurwa zvakare <unk> pakati pemasimba maviri aya <unk> uye yakaramba iri pasi pekugara kwechikamu chikuru chehondo. Pakazosvika 1 Gumiguru, Germany neSoviet Union vakanga vanyanyisa Poland, kunyangwe hazvo hurumende yePoland isina kumbobvira yazvipira zviri pamutemo, uye Nyika yePoland Underground, iri pasi pehurumende yePoland iri muhunhapwa, yakaumbwa munguva pfupi. Musi wa8 Gumiguru, Nazi Germany yakabatanidza nzvimbo dzekumadokero dzePoland yepamberi pehondo uye, munzvimbo dzakasara dzakagarwa, yakamisa Hurumende yeGeneral. Soviet Union yaifanira kupa kwenguva pfupi nzvimbo dzayo dzakakunda muna 1939 nekuda kwekupinda kweGerman muSoviet Union, asi yakadzoserwa zvachose.
Soviet Union