Pedzisa mutsara unotevera: Pana 17 September 1939, pashure pokupinda kweGermany kumadokero kwePoland maererano nechinyorwa chakavanzika cheMolotov-Ribbentrop Pact, mauto eSoviet akapinda kumabvazuva kwePoland. Sezvo huwandu hukuru hweuto rePoland hwakanga hwakaunganidzwa kumadokero vachirwisa Nazi Germany, Red Army yakasangana nekupokana kushoma uye mauto avo akakurumidza kuenda kumadokero, achipinda munzvimbo yeVoivodeship nyore nyore. Vakasangana navaGermany vaipinda munzira yeCurzon Line ndokubata
kufora kwokukunda pamwe chete.