of the Vistula, consisting of the 23rd, the 55th and the 22th I.D.'s, together with Kraków Cavalry Brigade, and soldiers of Fortified Group Silesia), and Operational Group Boruta (south of the Vistula, consisting of the 6th and the 21st I.D.'s, the 10th Motorized Brigade, and the 1st Mountain Brigade). Szylling hoped to reach the defensive line by September 7, and first days of retreat were relatively calm, as the Wehrmacht concentrated its efforts in the area of Piotrków Trybunalski. The End of Kraków Army On September 5, German 2nd Panzer Division, together with the 3rd Mountain Division and the 7th Infantry Division broke through Polish lines near Pcim, capturing Myślenice, Bochnia and Wiśnicz, thus positioning themselves in the rear of the retreating units of Operational Group Boruta. On the same day, Fall 5 September instruction was issued by the Oberkommando der Wehrmacht, ordering German divisions to continue their advance towards Tarnów and Rzeszów. On September 6, German 4th Light Division attacked Polish 24th I.D. near Tarnów, crossing the Dunajec south of Zakliczyn. Polish unit managed to halt the Germans, and its commandant, Colonel Bolesław Krzyżanowski hoped to keep the line of the Dunajec for Operational Group Boruta. In the evening of September 6, General Kazimierz Fabrycy ordered him to retreat to the Wisłoka river. On the same day, Polish units abandoned Kraków. On September 6, Marshall Śmigły-Rydz reorganized the units fighting in southern Lesser Poland. Operational Group Boruta was moved to Karpaty Army, and soon afterwards, Karpaty Army was merged with Operational Group Jagmin, creating Małopolska Army, under General Fabrycy. Śmigły-Rydz was well aware of the fact that it was impossible to hold the line of the Dunajec and the Nida, and that further retreat towards the San was the only option. Organization The Army was commanded by general Antoni Szylling; his chief of staff was colonel S. Wiloch. It consisted of five infantry divisions, one motorized cavalry brigade, one mountain brigade and one cavalry brigade. The 22nd Mountain Infantry Division (Colonel Leopold Endel-Ragis) was supposed to be the reserve of Łódź Army, but due to destruction of rail connections, this division never reached its destination in central Poland. It concentrated near Krzeszowice and Trzebinia, and on September 2 joined Kraków Army, replacing the 7th I.D., which had been destroyed near Częstochowa. References Armie i samodzielne grupy operacyjne Wojska Polskiego 1939 WIEM Encyklopedia Czesław Grzelak, Henryk Stańczyk Kampania polska 1939