dˈʊɹɹɪŋ ðə dʒˈɜːmən ɪnvˈeɪʒən ʌv pˈoʊlənd wˌɪtʃ stˈɑːɹɾᵻd wˈɜːld wˈɔːɹ ɹˌoʊmən tˈuː, ˌɔn sɛptˈɛmbɚ fˈɪftiːn, nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi nˈaɪn, ðə dʒˈɜːmənz kəmˈɪɾᵻd tˈuː mˈæsəkɚz ʌv pˈoʊlz ɪn sˈuːlɪdʒˌaʊɛk ænd ðə pɹˈɛzəntdˈeɪ dˈɪstɹɪkt ʌv dˈiːlˈuːɡə ʃlˈæʃɛkə, kˈɪlɪŋ ˌoʊvɚ fˈɪfti ænd fˈoːɹɾi tˈuː pˈiːpəl ɹᵻspˈɛktɪvli sˈiː nˈɑːtsi kɹˈaɪmz ɐɡˈɛnst ðə pˈoʊlɪʃ nˈeɪʃən.
During the German invasion of Poland which started World War II, on September 15, 1939, the Germans committed two massacres of Poles in Sulejówek and the present-day district of Długa Szlachecka, killing over 50 and 42 people respectively (see Nazi crimes against the Polish nation).