Battle of Różan
The Battle of Różan, otherwise known as defence of Różan bridgehead, took place between the 4 and 6 September 1939, in the fields before the town of Różan on the Narew River. A small Polish garrison of three World War I forts successfully defended the bridgehead against the entire German panzer division for the entire day and night. However, as a result of a misunderstanding of the commander in chief's orders, the Polish forces were then withdrawn to the other side of the river, and then further eastwards on the 6 September.
Background
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. From September 1–3 the 3rd Army engaged the Polish Pomorze Army in the Battle of Mława, breaking through the Polish defenses on September 4 and forcing the surviving Polish units to fall back to the Modlin Fortress, which lay at the intersection of the Vistula and Narew rivers. 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.Różan was defended by 3,300 troops primarily belonging to the 115th Infantry Regiment of the 41st (Reserve) Infantry Division, commanded by Col. Czesław Rzedzicki and supported by a battalion of 75mm artillery guns, all under the overall command of Operational Group Wyszków, commanded General Wincenty Kowalski.