20 Zlotys Battle of Warsaw

The Battle of Warsaw in August 1920 — sometimes called the "Miracle on the Vistula" — saw Polish forces under Józef Piłsudski repel the Soviet Red Army at a moment when Lenin's government fully expected to carry revolution into Western Europe. The Polish victory effectively ended the Soviet westward advance and is considered by some historians among the most consequential military engagements of the twentieth century.

The 3D pad printing technique applied to the silver gives the coin a tactile topographic surface — a relatively novel production method at the time of issue, used by the NBP to distinguish commemoratives requiring dimensional relief beyond what conventional dies can achieve.