Battle of Grunwald (1410)
Historical Background
Lithuanian Crusade and Polish–Lithuanian union
In 1230 the Teutonic Knights, a crusading military order, moved to Chełmno Land and launched the Prussian Crusade against the pagan Prussian clans. With support from the pope and Holy Roman
The Holy Roman Empire was a political entity in Western, Central, and Southern Europe that developed during the Early Middle Ages and continued until its dissolution in 1806 during the Napoleonic Wars. From the accession of Otto I in 962 until the twelfth century, the Empire was the most powerful monarchy in Europe. The empire reached the apex of territorial expansion and power in the mid-thirteenth century, but overextending led to partial collapse. Emperor, the Teutons conquered and converted the Prussians by the 1280s and shifted their attention to the pagan Grand Duchy of Lithuania. For about 100 years the Teutonic Knights
The Teutonic Order is a Catholic religious institution founded as a military society c. 1190 in Acre, Kingdom of Jerusalem. The Order of Brothers of the German House of Saint Mary in Jerusalem was formed to aid Christians on their pilgrimages to the Holy Land and to establish hospitals. Its members have commonly been known as the Teutonic Knights, having a small voluntary and mercenary military membership, serving as a crusading military order for the protection of Christians in the Holy Land and the Baltics during the Middle Ages. raided Lithuanian lands, particularly Samogitia, as it separated the Knights in Prussia from their branch in Livonia. While the border regions became an uninhabited wilderness, the Knights gained very little territory. The Lithuanians first gave up Samogitia during the Lithuanian Civil War (1381–1384) in the Treaty of Dubysa. The territory was used as a bargaining chip to ensure Teutonic support for one of the sides in the internal power struggle.
In 1385 Grand Duke Jogaila of Lithuania agreed to marry Queen Jadwiga of Poland in the Union of Kreva. Jogaila converted to Christianity and was crowned as the King of Poland (Władysław II Jagiełło), thus creating a personal union between the Kingdom of Poland and the Grand Duchy of Lithuania. The official Lithuanian conversion to Christianity removed the religious rationale for the order's activities in the area. Its grand master, Conrad Zöllner von Rothenstein, supported by the Hungarian king, Sigismund of Luxemburg, responded by publicly contesting the sincerity of Jogaila's conversion, bringing the charge to a papal court. The territorial disputes continued over Samogitia, which had been in Teutonic hands since the Peace of Raciąż in 1404. Poland also had territorial claims against the Knights in Dobrzyń Land and Gdańsk (Danzig), but the two states had been largely at peace since the Treaty of Kalisz (1343). The conflict was also motivated by trade considerations: The knights controlled the lower reaches of the three largest rivers (the Neman, Vistula and Daugava) in Poland and Lithuania.
War, Truce and Preparations
In May 1409 an uprising in Teutonic-held Samogitia started. Lithuania supported it and the knights threatened to invade. Poland announced its support for the Lithuanian cause and threatened to invade Prussia in return. As Prussian troops evacuated Samogitia, Teutonic Grand Master Ulrich von Jungingen declared war on the Kingdom of Poland and the Grand Duchy of Lithuania on 6 August 1409. The Knights hoped to defeat Poland and Lithuania separately, and began by invading Greater Poland and Kuyavia, catching the Poles by surprise. The Knights burned the castle at Dobrin (Dobrzyń nad Wisłą), captured Bobrowniki after a 14-day siege, conquered Bydgoszcz (Bromberg) and sacked several towns. The Poles organized counterattacks and recaptured Bydgoszcz. The Samogitians attacked Memel (Klaipėda). However, neither side was ready for a full-scale war.
Wenceslaus, King of the Romans, agreed to mediate the dispute. A truce was signed on 8 October 1409 and was set to expire on 24 June 1410. Both sides used this time to prepare for war, gathering troops and engaging in diplomatic maneuvering. Both sides sent letters and envoys accusing each other of various wrongdoings and threats to Christendom. Wenceslaus, who received a gift of 60,000 florins from the knights, declared that Samogitia rightfully belonged to the knights and only Dobrzyń Land should be returned to Poland. The knights also paid 300,000 ducats to Sigismund of Hungary, who had ambitions regarding the Principality of Moldavia, for mutual military assistance. Sigismund attempted to break the Polish–Lithuanian alliance by offering Vytautas a king's crown; Vytautas's acceptance would have violated the terms of the Ostrów Agreement and created Polish-Lithuanian discord. At the same time, Vytautas managed to obtain a truce from the Livonian Order.
By December 1409 Władysław II Jagiełło and Vytautas had agreed on a common strategy: Their armies would unite into a single massive force and march together towards Marienburg (Malbork), capital of the Teutonic Knights. The Knights, who took a defensive position, did not expect a joint attack and were preparing for a dual invasion—by the Poles along the Vistula River towards Danzig (Gdańsk) and the Lithuanians along the Neman River towards Ragnit (Neman). To counter this perceived threat, Ulrich von Jungingen concentrated his forces in Schwetz (Świecie), a central location from where troops could respond to an invasion from any direction rather quickly. Sizable garrisons were left in the eastern castles of Ragnit, Rhein (Ryn) near Lötzen (Giżycko), and Memel (Klaipėda). To keep their plans secret and mislead the knights, Władysław II Jagiełło and Vytautas organised several raids into border territories, thus forcing the knights to keep their troops in place.
HISTORY
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