Mgbe Agha Ụwa nke Abụọ malitere, ndị Nazi Germany na ndị Soviet Union wakporo Poland, na nke mbụ, ndị Soviet weghaara obodo ahụ
, n'ihi nkwekọrịta Molotov-Ribbentrop. E jikọtara ya na Byelorussian SSR site na 1939 ruo 1941 dị ka isi obodo nke Belastok Region. A chụgara ndị Poland n'ime ime USSR (Siberia, Kazakhstan, Far North). N'oge mwakpo ndị German nke Soviet Union na 1941, Białystok bụ ndị ndị agha German na-achịkwa na 27 June 1941, n'oge Agha nke Białystok <unk> Minsk, obodo ahụ wee bụrụ isi obodo nke Bezirk Białystok, mpaghara dị iche na Poland nke ndị Germany na-achị, ruo 1944. Ndị Germany gbara Ụlọ Nzukọ Ukwu ahụ ọkụ na June 27, 1941, bụ́ ebe e mere atụmatụ na ọnụ ọgụgụ ndị Juu nọ n'ime ya dị puku mmadụ abụọ.