Mezue ahịrịokwu na-esonụ: Na 1 Septemba 1939, Germany wakporo Poland, na-amalite Agha Ụwa nke Abụọ na Europe, na 17 Septemba, na-agbaso Molotov-Ribbentrop Pact, Poland wakporo Soviet Union. Mgbe nke ahụ gasịrị, e kewara Poland ọzọ n'etiti ike abụọ a ma nọrọ n'okpuru ọchịchị Poland.
ihe ka ukwuu n'agha ahụ. Ka ọ na-erule 1 Ọktoba, Germany na Soviet Union meriri Poland kpamkpam, ọ bụ ezie na gọọmentị Polish enyefeghị onwe ya n'ụzọ iwu, na Polish Underground State, nke dị n'okpuru gọọmentị Polish-na-achụpụ, ka e guzobere n'oge na-adịghị anya. N'abalị asatọ n'ọnwa Ọktoba, ndị Nazi Germany weghaara mpaghara ọdịda anyanwụ nke Poland tupu agha ahụ, na mpaghara ndị fọdụrụ na mpaghara a na-achịkwa, guzobere Gọọmentị General. Soviet Union hapụrụ nwa oge ihe ndị o nwetara na 1939 n'ihi mwakpo ndị Germany na Soviet Union, mana weghachite ọtụtụ mpaghara a mgbe ọ nwetasịrị ya n'etiti 1944. N'oge agha ahụ, Poland tụfuru ihe karịrị 20% nke ndị bi na ya tupu agha ahụ n'etiti ọrụ nke gosipụtara njedebe nke Polish Republic nke Abụọ.