Dywizja Piechoty) was a unit of the Polish Army during the interbellum period, which took part in the 1939 German Invasion of Poland.

Its task was to defend the fortified area along the upper Warta river, near the interwar border of Poland and Germany.

Since early morning of 1 September 1939, the Division was mercilessly attacked by the German Eighth Army, supported by aircraft and artillery.

However, in the organizational and communicational chaos, the unit arrived at the destination several hours too late, after the Germans of the 17th Infantry Division had already crossed the Warta in some spots.

On 8 September, after several German attacks, the Division was scattered, a group of soldiers crossed the Vistula near Otwock.