Riverine Flotilla of the Polish Navy

The Riverine Flotilla of the Polish Navy (Polish: Flotylla Rzeczna Marynarki Wojennej), better known as the Pinsk Flotilla, was the inland branch of the Polish Navy operating on the Vistula river and in the area of the Pinsk Marshes (Dnieper–Bug Canal) between the Polish–Bolshevik War and World War II. Under Commodore Witold Zajączkowski, it was active in the invasion of Poland and fought against both German and Soviet forces. == Flotilla in the Polish-Bolshevik War of 1920 == During the Polish-Bolshevik War the Pinsk Marshes proved to be almost impassable to troops of both sides.

Source: Wikipedia — Riverine Flotilla of the Polish Navy (CC BY-SA 4.0)