Mezue ahịrịokwu na-esonụ: N'ihi nkwekọrịta nke Versailles, ala Chełmno laghachiri Poland na Jenụwarị 1920, mgbe ndị Poland nwetaghachiri nnwere onwe na 1918. N'oge agha ahụ, ọ bụ mpaghara ndịda nke Pomeranian Voivodeship na isi obodo na Toruń. Ọ nọchiri mgbe mbuso agha nke Poland na Septemba 1939 site na Nazi Germany ma jikọta ya na Ọktọba, agbanyeghị, na-enweghị nnabata mba ụwa. N'oge
N'oge ọchịchị ndị Germany, ndị Germany mere "Intelligenzaktion", bụ́ ogbugbu a kpara atụmatụ igbu ndị Poland nọ n'ógbè ahụ. N'oge mgbụsị akwụkwọ nke afọ 1939, e gbuola ihe dị ka puku ndị Poland iri abụọ na atọ bi n'ebe a na-akpọ Pomeranian Voivodeship tupu agha ahụ amalite. Na Jenụwarị 1945, ndị agha Red Army weghaara ya, ndị Germany weghaara akụkụ a nke Poland.