However, as a result of a misunderstanding of the commander in chief's orders, the Polish forces were then withdrawn to the other side of the river, and then further eastwards on the 6 September.

[1] On September 1, 1939, the German Wehrmacht invaded Poland, with the 3rd Army under Georg von Küchler advancing south from East Prussia with the intention of seizing a bridgehead across the Vistula.

General Fedor von Bock, the commander of the German Army Group North, then intervened, ordering von Küchler to cease his advance towards Modlin and instead redirect his forces towards Różan to seize a crossing of the Narew, with the ultimate intention of sweeping the 3rd Army behind the main Polish force to seize Łomża and then cross the Bug river.

Around noon, Panzer Division Kempf arrived on the battlefield, and the Germans launched another attack, supported by artillery and six Heinkel He 111 bombers.

However, General Kowalski recognized that the severely outnumbered Polish troops were likely to be overrun by a followup assault and authorized an overnight withdrawal.