Poland – Battle of Chmielnik
On this day in 1241, invading Mongol forces overwhelmed Polish forces in the Battle of Chmielnik. This battle took place during the wider Mongol invasion of Poland which had begun in 1240. As a result of the battle, the Polish city of Krakow was plundered.
Also the Book:
The Mongols – A History, by Jeremiah Curtin