The Polish 23rd Infantry Division of Group Slask defended a fortified zone that protected the industrial center of Katowice. While German armor attempted to break through elsewhere, the German 8th Infantry Division attacked into the heart of the fortifications. They were unable to break the lines on 1 September. They launched another attack on the following morning. The 8th had the benefit of a self-propelled ‘88’ company of its Panzerjager Battalion 8. Initially used as artillery, they were called forward to fire directly at the bunkers.