機甲師団
On the morning of 14 September, General Władysław Bortnowski's 26th and 16th Infantry Divisions crossed the Bzura near Łowicz. The Polish 4th Infantry Division reached the road linking Łowicz with Głowno. At this point however, Bortnowski ordered the 26th Infantry Division to retreat. He had learned of the withdrawal of the German 4th Panzer Division from the outskirts of Warsaw, and was concerned that this Panzer division posed a threat to his men.