In the effect of a two-day assault, the Polish forces broke through the German line of defence on their way towards the city of Lwów (modern Lviv).

Although the army, since 13 September commanded by General Kazimierz Sosnkowski, maintained a high morale and remained in relatively good fighting condition during the first two weeks of the war, a string of retreats seriously depleted its forces.

[2] In a lengthy night assault of the German main position the Polish forces broke through to a large forest complex extending to the north and west of the town of Janów and dominating the road between Przemyśl and Lwów.

[2] Under orders from General Kazimierz Sosnkowski, the 11th ("Carpathian"), 24th and 38th Infantry Divisions were advancing toward the forests near Janów (present day Ivano-Frankov) to enter Lwów.

Under the command of Colonel Bronisław Prugar-Ketling, the Carpathian Infantry Division was advancing on the left flank, formed into two columns.

The regiment of SS-Standarte Germania, (predecessor of SS Viking), a mechanized unit, and the 1st Mountain Division were defending against the attack.

In the meantime, the 48th Infantry Regiment attacked and took Rozgozno; several POWs were taken, as were six anti-tank guns, a battery of light artillery, and an unknown number of trucks.

A Polish infantry battalion did repel the German counter-attack at Dobrostany, destroying several heavy guns and armored cars.

General Kazimierz Sosnkowski set up his HQ in the forests near Berdyczow and told his forces to focus their defensive efforts on the western flank.

With the benefit of hindsight, General Sosnkowski wrote that the success of the Polish infantry in the battle was due to the foot soldiers being the best organized, commanded and trained within the entire Southern Front.

Breaking through to Lviv became unrealistic, since the town was encircled by the united forces of Nazi Germany and the Soviet Union.