The Museum is located in a casemate corridor of the so-called “Small Sluice” of the Poznań Citadel, the former
Fort Winiary, erected by Prussians between 1828 and 1842. It holds items related to the history of the Polish
Army from the interbellum period, with particular focus on the 'Poznań' Army in the 1939 September campaign
and the Battle of the Bzura.
The exhibition features elements of a Polish soldier’s equipment and weapons as well as an interesting display of battlefield remnants from the Battle of the Bzura. The Museum also has a large collection of photographs depicting the everyday life and army service in military units stationed in the 4th Corps District (Okręg Korpusu nr VII).