Complex sentence: In the night of September 3/4, the Brigade withdrew towards lower Narew, it was located near Ostrów Mazowiecka on September 8, where it attacked Panzer Division Kempf, under General Werner Kempf.
Split into simpler sentences: In the night of September 3/4, the Brigade withdrew towards the lower Narew river. It was located near Ostrów Mazowiecka on September 8, where it attacked Panzer Division Kempf, under General Werner Kempf.