Mongol incursions in the Holy Roman Empire

Mongol incursions in the Holy Roman Empire took place in the spring of 1241 and again in the winter of 1241–42. They were part of the first Mongol invasion of Europe.

The Mongols did not advance far into the Holy Roman Empire and there was no major clash of arms on its territory. Rather, the army that had invaded Poland, after harassing eastern Germany, crossed the March of Moravia in April–May 1241 to rejoin the army that had invaded Hungary. During their transit, they laid waste the Moravian countryside but avoided strongholds. King Wenceslaus I of Bohemia was joined by some German princes, but he monitored the Mongols in Moravia without seeking battle. There were more significant skirmishes in the north of the Duchy of Austria a month later that left several hundred dead, but there was no cooperation between the Austrians and Hungarians.

In response to the Mongol threat, the imperial church and the imperial princes held assemblies to organize a military response. Pope Gregory IX ordered the preaching of a crusade and from Italy Emperor Frederick II issued an encyclical to that end. A crusading army under the command of King Conrad IV of Germany mustered on 1 July 1241, but was disbanded a few weeks after setting out because the danger had passed.

Although there was no major military action in the Empire, rumours that the Mongols had been checked there spread far beyond the Empire's borders. There are records in several languages from Spain to Armenia of the Bohemian or German king defeating the Mongols and forcing their retreat. In Moravia, a supposed victory over the Mongols took on legendary proportions. In Germany, some contemporary writers attributed the Mongols' general retreat from Europe to the intimidating crusading army. In reality, the Mongols likely spared most of Germany because their primary objective was to punish the Hungarian king for supporting the Cumans.

The Mongols raided eastern Austria and southern Moravia again in December 1241 and January 1242. A century later in 1340 they raided the March of Brandenburg. Anti-Mongol crusades were preached within the Empire's borders several times between these two raids, and even as late as 1351.