The attack on Europe was planned and executed by Subutai, who achieved perhaps his most lasting fame with his victories there. Having devastated the various Rus' principalities, he sent spies into Poland and Hungary, and as far as eastern Austria, in preparation for an attack into the heartland of Europe. Having a clear picture of the European kingdoms, he prepared an attack nominally commanded by Batu Khan and two other familial-related princes. Batu Khan, son of
Jochi, held supreme command, but Subutai was the strategist and commander in the field, and as such, was present in both the northern and southern campaigns against Rus' principalities. He also commanded the central column that moved against Hungary. While
Kadan's northern force won the
Battle of Legnica and
Güyük's army triumphed in
Transylvania, Subutai was waiting for them on the Hungarian plain. The newly reunited army then withdrew to the
Sajó river where they inflicted a decisive defeat on King
Béla IV of Hungary at the
Battle of Mohi. Again, Subutai masterminded the operation, and it would prove one of his greatest victories.
Invasion of Poland |alt=19th-century oil painting of Henry II the Pious by Jan Matejko display the head of
Henry II of the
Duchy of Silesia and
High Duke of Poland|alt=Medieval manuscript illustration showing Mongol soldiers displaying the severed head of Henry II The Mongols invaded Central Europe with three armies. One army defeated an alliance which included forces from
fragmented Poland and their allies, led by
Henry II the Pious,
Duke of Silesia in the
Battle of Legnica. A second army crossed the
Carpathian mountains and a third followed the
Danube. The armies re-grouped and crushed Hungary in 1241, defeating the Hungarian army at the
Battle of Mohi on April 11, 1241. The devastating Mongol invasion killed half of Hungary's population. The armies swept the plains of Hungary over the summer, and in early 1242 regained impetus and launched campaigns into
Dalmatia and
Moravia. The Great Khan had, however, died in December 1241, and on hearing the news, all the "Princes of the Blood," against Subutai's recommendation, went back to Mongolia to
elect the new Khan. After sacking
Kiev, Batu Khan sent a smaller group of troops to Poland, destroying
Lublin and defeating an inferior Polish army. Other elements, not part of the main Mongol force, encountered difficulty near the Polish-Halych border. The Mongols then reached Polaniec on the
Czarna Hańcza, where they set up camp. There, the
Voivode attacked them with the remaining Cracovian knights, which were few in number, but determined to vanquish the invader or die. Surprise gave the Poles an initial advantage and they managed to kill many Mongol soldiers. When the invaders realized the actual numerical weakness of the Poles, they regrouped, broke through the Polish ranks and defeated them. During the fighting, many Polish prisoners of war found ways to escape and hide in the nearby woods. The Polish defeat was partly influenced by the initially successful Polish knights having been distracted by looting.
Invasion of German lands On April 9, 1241, Mongol detachments entered the
Margravate of Meissen and the
March of Lusatia following a decisive Mongol victory at the
Battle of Legnica in Poland. The Mongol
light reconnaissance units, led by
Orda Khan, pillaged through Meissen and burned most of the city of
Meissen to the ground. The
Chronica sancti Pantaleonis records these attacks.
Invasion of Lands of the Bohemian crown (Bohemia, Moravia) After the defeat of the European forces at Legnica, the Mongols then continued pillaging throughout Poland's neighboring states, particularly
Moravia. King
Wenceslaus I of Bohemia returned to protect his kingdom after arriving in Legnica a day late. He gathered reinforcements from
Thuringia and
Saxony on his way back. He stationed his troops in the mountainous border regions of Bohemia where the Mongols would not be able to utilize their cavalry effectively. By that time, Mongolian forces had divided into two, one led by Batu and Subutai who were planning to invade
Hungary, and another led by Baidar and Kadan who were ravaging their way through Silesia and
Moravia. When they arrived to attack
Bohemia, the kingdom's defenses discouraged them from attacking and they withdrew to the town of
Otmuchów in Poland. A small force of Mongolians did attack the strategically located (on the way to the mountain passes) Bohemian town of
Kladsko (Kłodzko) but Wenceslaus' cavalry managed to fend them off. The Mongols then tried to take the town of
Olomouc, but Wenceslaus with the aid of Austrian Babenbergs repulsed the raid. A Mongol commander was captured in a sortie near Olomouc. However, due to limited historical data, the at this time is questionable. Under Wenceslaus' leadership during the Mongol invasion, Bohemia remained one of a few central European kingdoms that was never pillaged by the Mongols even though most countries around it such as Poland and Hungary were ravaged. After these failed attempts, Baidar and Kadan continued raiding Moravia (via the
Moravian Gate route into the valley of the river
Morava towards the
Danube) before finally going southward to reunite with Batu and Subutai in
Hungary.
Invasion of Hungary The Hungarians had first learned about the Mongol threat in 1229, when
King Andrew II granted asylum to some fleeing Ruthenian
boyars. Some Magyars (Hungarians), left behind during the main migration to the
Pannonian basin, still lived on the banks of the upper
Volga (it is believed by some that the descendants of this group are the modern-day
Bashkirs, although this people now speaks a
Turkic language, not Magyar). In 1237 a
Dominican friar,
Julianus, set off on an expedition to lead them back, and was sent back to King Béla with a letter from Batu Khan. In this letter, Batu called upon the Hungarian king to surrender his kingdom unconditionally to the
Tatar forces or face complete destruction. Béla did not reply, and two more messages were later delivered to Hungary. The first, in 1239, was sent by the defeated
Cuman tribes, who asked for and received asylum in Hungary. The second was sent in February 1241 by the defeated Polish princes. Only then did King Béla call upon his magnates to join his army in defense of the country. He also asked the papacy and the Western European rulers for help. Foreign help came in the form of a small knight-detachment under the leadership of
Frederick II, Duke of Austria, but it was too small to change the outcome of the campaign. The majority of the Hungarian magnates also did not realize the urgency of the matter. Some may have hoped that a defeat of the royal army would force Béla to discontinue his centralization efforts and thus strengthen their own power. Although the Mongol danger was real and imminent, Hungary was not prepared to deal with it; in the minds of a people who had lived free from nomadic invasions for the last few hundred years, an invasion seemed impossible, and Hungary was no longer a predominantly soldier population. Only rich nobles were trained as heavy-armored cavalry. The Hungarians had long since forgotten the light-cavalry strategy and tactics of their ancestors, which were similar to those now used by the Mongols. The Hungarian army (some 60,000 on the eve of the
Battle of Mohi) was made up of individual knights with tactical knowledge, discipline, and talented commanders. Because his army was not experienced in nomadic warfare, King Béla welcomed the Cuman King Kuthen (also known as
Kotony) and his fighters. However, the Cuman invitation proved detrimental to the Hungarians because Batu Khan considered this acceptance of a group he considered rebels as justifications for his invasion of Hungary. After rumors began to circulate in Hungary that the Cumans were agents of the Mongols, some hot-headed Hungarians attacked the Cuman camp and killed Kotony. This led the enraged Cumans to ride south, ravaging the countryside, and slaughtering the unsuspecting Magyar population. The Austrian troops retreated to Austria shortly thereafter to gain more western aid. The Hungarians now stood alone in the defense of their country. The 1241 Mongol invasion first affected
Moldavia and
Wallachia (situated east and south of the
Carpathians). Tens of thousands of Wallachians and Moldavians lost their lives defending their territories from the
Golden Horde. Crops and goods plundered from Wallachian settlements seem to have been a primary supply source for the Golden Horde. The invaders killed up to half of the population and burned down most of their settlements, thus destroying much of the cultural and economic records from that period. Neither the Wallachians nor the army of Hungary offered much resistance against the Mongols. The swiftness of the invasion took many by surprise and forced them to retreat and hide in forests and the enclosed valleys of the Carpathians. In the end, however, the main target of the invasion was the Kingdom of Hungary. During the winter, contrary to the traditional strategy of nomadic armies which started campaigns only in spring-time, they crossed the
Danube and continued their systematic occupation, including
Pannonia. They eventually reached the Austrian borders and the Adriatic shores in
Dalmatia. The Mongols appointed a
darughachi in Hungary and minted coins in the name of the Khagan. According to
Michael Prawdin, the country of Béla was assigned to Orda by Batu as an
appanage. At least 20–40% of the population died, by slaughter or epidemic.
Rogerius of Apulia, an
Italian monk and chronicler who witnessed and survived the invasion, pointed out not only the
genocidal element of the occupation, but also that the Mongols especially "found pleasure" in humiliating local women. But while the Mongols claimed control of Hungary, they could not occupy fortified cities such as
Fehérvár,
Veszprém,
Tihany,
Győr,
Pannonhalma,
Moson,
Sopron,
Vasvár,
Újhely, Zala,
Léka,
Pozsony,
Nyitra,
Komárom,
Fülek and
Abaújvár. Learning from this lesson, fortresses came to play a central role in Hungary's defense. King Béla IV rebuilt the country and invested in fortifications. Facing a shortage of money, he welcomed the settlement of Jewish families, investors, and tradesmen, granting them citizenship rights. The King also welcomed tens of thousands of Kun (Cumans) who had fled the country before the invasion. Chinese
fire arrows were deployed by Mongols against the city of Buda on December 25, 1241, which they overran. The Mongolian invasion taught the Magyars a simple lesson: although the Mongols had destroyed the countryside, the forts and fortified cities had survived. To improve their defense capabilities for the future, they had to build forts, not only on the borders but also inside the country. In the siege of
Esztergom, the defenses managed to hold off the Mongolians despite the latter having overwhelming numerical superiority and 30 siege machines which they had just used to reduce the wooden towers of the city. During the remaining decades of the 13th century and throughout the 14th century, the kings donated more and more royal land to the magnates with the condition that they build forts and ensure their defenses.
Invasion of Croatia the Mongols experienced defeat in 1242. After being routed on the banks of the
Sajó river in 1241 by the Mongols, Béla IV fled to today's
Zagreb in
Croatia. Batu sent a few tumens (roughly 20,000 men at arms) under Khadan in pursuit of Bela. The major objective was not the conquest but the capture of the Arpad king. The poorly fortified Zagreb was unable to resist the invasion and was destroyed, its
cathedral burned by Mongols. In preparation for a second invasion,
Gradec was granted a royal charter or
Golden Bull of 1242 by King Béla IV, after which citizens of Zagreb engaged in building defensive walls and towers around their settlement. The Mongols' pursuit of Béla IV continued from Zagreb through
Pannonia to
Dalmatia. While in pursuit, the Mongols under the leadership of
Kadan (Qadan) attacked
Klis Fortress in Croatia in March 1242. Due to the strong fortifications of Klis, the Mongols dismounted and climbed over the walls using nearby cliffs. The defenders were able to inflict a number of casualties on the Mongols, which enraged the latter and caused them to fight hand to hand in the streets and gather a sizable amount of loot from houses. As soon as they learned that King Bela was elsewhere, they abandoned the attack and split off to attack Split and Trogir. The Mongols pursued Béla IV from town to town in Dalmatia, while
Croatian nobility and Dalmatian towns such as
Trogir and
Rab helped Béla IV to escape. After being defeated by the Croatian soldiers, the Mongols retreated and Béla IV was awarded Croatian towns and nobility. Only the city of
Split did not aid Béla IV in his escape from the Mongols. Some historians claim that the mountainous terrain of Croatian Dalmatia was fatal for the Mongols because of the great losses they suffered from
Croat ambushes in mountain passes. Historians estimate that up to half of Hungary's two million population at that time were killed during the Mongol invasion of Europe.
Invasion of Austria The subjugation of Hungary opened a pathway for the Mongol Horde to invade
Vienna. Using similar tactics during their campaigns in previous Eastern and Central European countries, the Mongols first launched small squadrons to attack isolated settlements in the outskirts of Vienna in an attempt to instill fear and panic among the populace. In 1241 the Mongols raided
Wiener Neustadt and its neighboring districts, located south of Vienna. Wiener Neustadt took the brunt of the attack and, like previous invasions, the Mongols committed horrible atrocities on the relatively unarmed populace. The city of
Korneuburg, just north of Vienna, was also pillaged and destroyed. The Duke of Austria,
Frederick II, had previously engaged the Mongols in Olomouc and in the initial stages of the Battle of Mohi. Unlike in Hungary however, Vienna under the leadership of Duke Frederick and his knights, together with their foreign allies, managed to rally quicker and annihilate the small Mongolian squadron. After the battle, the Duke estimated that the Mongols lost 300 to upwards of 700 men, while the defending Europeans lost 100. Austrian knights also subsequently defeated the Mongols at the borders of the
River March in the district of
Dévény (Devín). After the failed initial raids, the rest of the Mongols retreated after learning of the Great Khan
Ögedei's death.
Invasion of Bulgaria During his withdrawal from Hungary back into Ruthenia, part of Batu Khan's army invaded Bulgaria. A Mongolian force was defeated by the Bulgarian army under Tsar
Ivan Asen II. A larger force returned to raid Bulgaria again the same year, though little is known of what happened. According to the Persian historian
Rashid-al-Din Hamadani, the Bulgarian capital of Tarnovo was sacked. This is unlikely, but rumor of it spread widely, being repeated in Palestine by Bar Hebraeus. The invasion of Bulgaria is mentioned in other contemporary sources, such as Philippe Mouskès, Thomas of Cantimpré and Ricoldo of Montecroce. Contemporary documents indicate that by 1253,
Michael Asen of Bulgaria was a tribute-paying vassal of the Mongols, a status the country had probably been forced to accept during the invasion of 1242. ==European tactics against Mongols==