Mezue ahịrịokwu na-esonụ: Ndị Soviet Union weghaara ya na-eso nkwekọrịta Molotov-Ribbentrop nke 1939, ọ nọ n'okpuru iwu siri ike nke NKVD. Ụlọ mkpọrọ ahụ a na-arụchabeghị bụ nke ndị NKVD weghaara na Disemba 1939 ma jiri ya maka ndị mkpọrọ ndọrọ ndọrọ ọchịchị si n'akụkụ niile nke Poland ndị Soviet na-achị. A na-edebe ndị mkpọrọ dị n'agbata 1500 na 3000 n'ebe ahụ n'ọnọdụ ndị siri ike, ebe ndị mkpọrọ ọhụrụ na-abịarute mgbe e bugara ndị nke gara aga n'usoro na Gulag na ụlọ mkpọrọ ndị ọzọ nke Soviet. Na 1940, e jidere ihe ka ọtụtụ ná ndị Poland nọ n'ógbè ahụ ma kpọga ha n'ụlọ mkpọrọ dị iche iche nke Soviet na ụlọ mkpọrọ dị iche iche na USSR. Na 1941, mgbe agha Soviet-German bidoro, na June 24 na June 25, 1941, ihe dị ka ndị mkpọrọ 550 nke ụlọ mkpọrọ Dubno gburu ndị NKVD na-apụ apụ mgbe naanị mmadụ 8 n'ime ha lanarịrị. N'ihe dị ka oge ahụ na gburugburu obodo (na gburugburu Lutsk na Brody) a lụrụ nnukwu agha tank. N'ime
Agha nke Brody (1941) German 1st Panzer Group n'okpuru Ewald von Kleist jisiri ike mebie mwakpo nke Soviet 9th na 19th Mechanized Corps, na 8th Mechanized Corps. 8th Corps Tank Group weghaara Dubno ma jide ya ruo ụbọchị 5 tupu ndị agha German siri ike weghachite ya (n'okpuru Konstantin Rokossovski, Nikolay Feklenko na DI Rybjasev, Onye isi nke 8th Corps Tank group bụ brigade commissar N.K. Popel, n'otu n'otu). N'oge na-adịghị anya mgbe nke ahụ gasịrị, Germany weghaara obodo ahụ. N'oge ndị Jamanị na-achị obodo ahụ, ha gbawara ụlọ ezumezu obodo ahụ e wuru na narị afọ nke iri na asatọ.