The 'Battle of Borowa Góra' was in fact a series of engagements fought between German and Polish forces in the 'Weiss' (i) German invasion of Poland near the Góry Borowskie hills, to the south-west of Piotrków Trybunalski and the east of Bełchatów (2/6 September 1939).

The battle, fought in the vicinity of Łódź, was a direct consequence of the 'Battle of the Border', an early part of the German 'Weiss' (i) invasion of Poland.

The three hills, rising to a maximum height of 912 ft (278 m) above sea level, formed an important strategic point that General Erich Hoepner’s XVI Corps (mot.), a formation of General Walter von Reichenau’s 10^th Army in Generaloberst Gerd von Rundstedt’s Heeresgruppe 'Süd', needed to break through in order to advance toward Radomsko, Piotrków Trybunalski and Bełchatów, and thus farther into the central part of Poland. The area was defended by the Polish 2^nd Legions Regiment, part of the 2^nd Legions Division, under the command of Pulkownik Ludwik Czyżewski, and the 146^th Regiment, part of the 44^th Division, under the command of Pulkownik Artur Pollak. Both of these Polish units were belonged to Generał dywizji Juliusz Rómmel’s Łódź Armiya. The XVI Corps (mot.) comprised Generalleutnant Rudolf Schmidt’s 1^st Panzerdivision, Generalleutnant Georg-Hans Reinhardt’s 4^th Panzerdivision, Generalleutnant Peter Weyer’s 14^th Division and Generalleutnant Rudolf Kaempfe’s 31^st Division.

During the intense fighting, the Polish casualties of the 2^nd Legions Regiment were 663 including 16 officers and 67 non-commissioned officers.

Generał brygady Wiktor Thommée, commander of the Piotrków Operational Group of the Łódź Armiya, ordered Czyżewski to defend a 15.5-mile (25-km) line in the area of Rozprza, on which the Polish units were supposed to hold their positions until 4 September, when a Polish counterattack was planned from the Sulejów forest. Since Czyżewski lacked sufficient strength to fulfil his orders, he decided to occupy three main defensive positions and to patrol the space between these. The centre of the Polish defence was established in the Góry Borowskie hills, which Polish units began to occupy during the night of 2/3 September. Janowski’s headquarters was located at a school in the village of Janów. Rómmel, altogether too aware of the German forces' overall numerical and technical superiority, decided to reinforce Czyżewski and despatched the 301^st Light Tank Battalion, under the command of Major Edmund Karpow. The battalion had 49 7TP tanks developed in Poland from the British Vickers 6-Ton Tank.

The first German units approached the Polish positions near Rozprza at 13.00 on 3 September. Two hours later the German armour attacked the Góry Borowskie hills, and the fighting lasted for several hours until the fall of night. The German ground forces were supported by the tactical warplanes of the Luftwaffe, which bombed the Polish positions, and as a result of the combined land and air attacks some of the Polish troops abandoned their positions. In the evening, leading units of the 1^st Panzerdivision captured Rozprza, but were later pushed back. At about 15.00, tanks of the 4^th Panzerdivision attacked Góry Borowskie, but after a fierce battle with the 3/2^nd Legions Regiment, under the command of Major Żelazowski, retreated and regrouped during night in preparation for an attack on the hills from the east during the morning of 4 September.

On 4 September, the morning saw the infantry attack of the 31^st Division along the road to Bełchatów. The German infantry was driven back, but near Rozprza, where German armour was present, the Polish defenders faced an altogether more difficult situation. The 1^st Panzerdivision attacked Rozprza, and the 4^th Panzerdivision concentrated its efforts on the seizure of Jeżów. In the afternoon of this same day, the entirety of the Polish front line came under attack between Góry Borowskie and Rozprza. Fighting lasted into the night, and in the morning of 5 September, the Germans attacked again with potent tactical air support. Facing inevitable defeat, Czyżewski ordered a retreat toward Dłutów, thereby opening the road to Piotrków for the Germans. Some Polish units remained unaware of Czyżewski’s order, and in some places continued to fight until the morning of 6 September.