Pedzisa mutsara unotevera: Kutevera kubatwa kweSoviet kwePoland yekumabvazuva, kweBaltic States uye kwe
Bessarabia neNorthern Bukovina muna 1939-1940, Stalin akasimbirira pakutora nzvimbo dzese dzenzvimbo dzichangobva kuitwa Soviet; kufamba uku kuenda kumadokero kwakamisa mauto kure nenzvimbo dzawo dzekuchengetera zvinhu, munzvimbo dzakakwirira dzaiita kuti vakwanise kukombwa. Sezvo kunetsana kwakakwira muchirimo cha1941, Stalin akaedza nomwoyo wose kuti asaita kuti Hitler aite chimwe chinhu chaigona kushandiswa neBerlin sechikonzero chokurwiswa neGermany; Stalin akaramba kubvumira mauto kuti arambe akagadzirira <unk> kunyange zvazvo mauto eGermany akanga aungana pamiganhu uye ndege dzeGermany dzokuongorora dzakanga dzichibhururuka pamusoro pezvivako. Kuramba kuita chiito chakakodzera uku kwakabetsera mukuparadzwa kwezvikamu zvikuru zveRed Air Force, zvakagadzirirwa panhandare dzayo dzendege, mumazuva okutanga ehondo yeGerman neSoviet.