The outbreak of the battle of Leignitz, 9 April 1241 (MED0104)

The Mongol invasion of Europe: the battle of Legnica, 1241

On 9 April 1241 a Mongol force under Baidar and Kadan destroyed the army of Henry II the Pious, Duke of Silesia, near Legnica. Two days later, six hundred kilometres to the south, a second Mongol army annihilated the Hungarians at Mohi. The two victories were coordinated: Europe was facing an army that could operate on separate axes and converge on schedule, something no western commander was organised to do.

An army built on movement

Mongol strength lay in horse archery, in remounts that allowed a hundred kilometres a day, and in a command system that transmitted orders across enormous distances. Their standard method was not the frontal charge but harassment followed by feigned retreat: draw the enemy heavy cavalry into pursuit, break its cohesion, then surround it. At Legnica this worked exactly as intended against the Silesian, Polish and Templar contingents.

What the European armies could not do

The knights facing them were individually better armoured and, at close quarters, formidable. But they had no answer to an opponent who refused contact, and their reconnaissance was inadequate to know where the Mongol columns were. Henry II was killed and his head paraded on a spear before the walls of Legnica.

The withdrawal that saved Europe

The invasion stopped not through defeat but through news from Karakorum: the Great Khan Ögedei had died in December 1241, and the commanders withdrew eastward for the succession. Historians still debate how much weight to give this — supply difficulties in the Hungarian plain and the sheer distance from the empire’s centre probably counted too. What is certain is that no European army had stopped them.

Equipment

Giuseppe Rava reconstructs the confrontation of two military worlds: western mail and great helm against Mongol lamellar, composite bow and light horse. It is a contrast of systems more than of soldiers.