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 members of various Christian
military orders, led by
Henry II the Pious, the
Duke of Silesia. 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 Bela being provided by the Poles and Military orders (including Teutonic knights in Prussia).