Mezue ahịrịokwu na-esonụ: Tupu afọ 1945, ebe a bụ akụkụ Germany (East Prussia). Mgbe Agha Worldwa nke Abụọ gachara, e debere mpaghara ahụ n'okpuru nchịkwa Polish site na Nkwekọrịta Potsdam n'okpuru mgbanwe mpaghara nke Soviet Union chọrọ. Ihe ka ọtụtụ ná ndị Germany
gbara ọsọ ma ọ bụ chụpụ ma jiri ndị Poland chụpụrụ site na mpaghara Polish ndị Soviet Union weghaara ma ọ bụ manyere ịbanye na mpaghara ahụ site na Operation Vistula na 1947.