Legnica became famous for the battle that took place at Legnickie Pole near the city on 9 April 1241 during the First Mongol invasion of Poland. The Christian army of the Polish duke Henry II the Pious of Silesia, supported by feudal nobility, which included in addition to Poles, Bavarian miners and military orders and Czech troops, was decisively defeated by the Mongols. The Mongols killed Henry and destroyed his forces, then turned south to rejoin the rest of the Mongol armies, which were massing at the Plain of Mohi in Hungary via Moravia against a coalition of King Bela IV and his armies, and Bela's Kipchak allies.