The Division was created at the end of August 1939, out of battalions of the
Upper Silesian Brigade of the
National Defence and the National Defence Regiment "
Szczakowa". Its task was to defend the
Fortified Area Mikołów, which was part of the
Fortified Area of Silesia. Between September 1 and 2, 1939, it fought against the advancing German 8th I.D. in the area of
Wyry. After heavy fighting, on 3 September it was forced to retreat towards the
Nida River. On 7 September the Division took part in the skirmishes northwest of
Kraków and around
Proszowice. Fighting its way, the unit managed to cross the Nida and withdraw eastwards. In the night of September 18/19, the Division joined Polish forces concentrated around
Tomaszów Lubelski. It capitulated on 23 September when it ran out of ammunition (see
Battle of Tomaszów Lubelski). ==References==