Battle of Chmielnik

Date: March 18, 1241 • Location: Sandomierz, Poland

First Mongol invasion of Poland: Mongol forces defeated the Polish armies of Sandomierz and Kraków at the Battle of Chmielnik.

The Mongol invasion of Poland from late 1240 to 1241 culminated in the Battle of Legnica, where the Mongols defeated an alliance which included forces from fragmented Poland and their allies, led by Henry II the Pious, the Duke of Silesia and High Duke of Poland. The first invasion's intention was to secure the flank of the main Mongolian army attacking the Kingdom of Hungary. The Mongols neutralized any potential help to King Béla IV being provided by the Poles or any military orders.