Mezue ahịrịokwu na-esonụ: N'okpuru iwu nke Joseph Stalin, Soviet Union mere ka a kpọga ìgwè dị iche iche n'ike tupu, n'oge na mgbe Agha Ụwa nke Abụọ gasịrị (site na 1930 ruo 1950). N'oge
Mgbapụ June nke 1941, mgbe ndị mba Baltic, Eastern Poland na Moldavia, dị ka nkwekọrịta nke Soviet Union na Nazi Germany na Molotov Ribbentrop Pact, na-anwa idobe mba ndị ahụ maka ịmanye ha ịbanye na Soviet Union, Soviet Union chụgara ọtụtụ iri puku ndị aka ha dị ọcha na Siberia.