Kammala jumla mai zuwa: Bayan mamayewar Soviet na 1939, Bronna Góra tare da yawancin Polesie Voivodeship an haɗa su cikin Soviet Belarus bayan zaɓen NKVD da aka yanke shawara a cikin yanayin ta'addanci. Duk 'yan ƙasa da suka rayu a baya amma kuma aka haife su a Poland za su zauna a Jamhuriyar Soviet ta Byelorussian daga wannan lokacin, a matsayin Soviet, ba Yaren mutanen Poland ba. Duk da haka, mulkin Soviet bai daɗe ba saboda an karya sharuɗɗan da suka dace da Yarjejeniyar Molotov-Ribbentrop da aka sanya hannu a baya a Moscow lokacin da sojojin Jamus suka tsallake iyakar.
Yankin da Soviet ta mamaye a ranar 22 ga Yuni 1941. Daga 1941 zuwa 1943 lardin ya kasance ƙarƙashin ikon Nazi Jamus, wanda ke gudanar da shi ta hanyar haɗin gwiwar Byelorussian Central Council da Nazi Belarusian battalions na Byelorussian Home Defence ke tallafawa.