It was created by merging several units of the Border Defence Corps, and its purpose was to support activities of Army Kraków and Army Karpaty, which guarded southern border of Poland.
After concentration, which took place in the area of Nizankowice, it was transferred to the Army Karpaty and on September 11, it began withdrawal towards the Romanian Bridgehead.
On the road, it recaptured the town of Sadowa Wisznia, which had been occupied by German 1st Mountain Division.
On September 17 the Division found itself in the area of Janów Lubelski, where it was surrounded by the Germans.
A battle ensued, in the evening the Division reached Brzuchowice in the suburbs of Lwów.