this was taken around the famous barriade of Żyrardów near Holy Trinity. these barriacdes were thrown up at choke points all over the city and its why germans had a hard time effectively mounting attacks. Warsaw was also a very built up city in this time, meaning that thebuildings were well made and also full of insurgents. it becomes clear how they were able to fight on as long as they did when you also combine this point here >>512311626