page_title: Polish–Lithuanian–Teutonic War
section_title: Historical background
hierarchical_section_title: Polish–Lithuanian–Teutonic War / Historical background
caption_attribution_description: Mapa Polski za panowania Władysława II Jagiełły (1386 - 1434)
context_page_description: The Polish–Lithuanian–Teutonic War, or Great War, occurred between 1409 and 1411 between the Teutonic Knights and the allied Kingdom of Poland and Grand Duchy of Lithuania. Inspired by the local Samogitian uprising, the war began by Teutonic invasion of Poland in August 1409. As neither side was ready for a full-scale war, Wenceslaus IV of Bohemia brokered a nine-month truce. After the truce expired in June 1410, the military-religious monks were decisively defeated in the Battle of Grunwald, one of the largest battles in medieval Europe. Most of the Teutonic leadership was killed or taken prisoner. Although they were defeated, the Teutonic Knights withstood the siege on their capital in Marienburg and suffered only minimal territorial losses in the Peace of Thorn. Territorial disputes lasted until the Peace of Melno of 1422. However, the Knights never recovered their former power, and the financial burden of war reparations caused internal conflicts and economic decline in their lands. The war shifted the balance of power in Central Europe and marked the rise of the Polish–Lithuanian union as the dominant power in the region.
context_section_description: In 1230, the Teutonic Knights, a crusading military order, moved to the Kulmerland (today within the Kuyavian-Pomeranian Voivodeship) and, upon the request of Konrad I, king of the Masovian Slavs, launched the Prussian Crusade against the pagan Prussian clans. With support from the Pope and Holy Roman Emperor, the Teutons conquered and converted the Prussians by the 1280s and shifted their attention to the pagan Grand Duchy of Lithuania. For about a hundred years the Knights fought the Lithuanian Crusade raiding the Lithuanian lands, particularly Samogitia as it separated the Knights in Prussia from their branch in Livonia. The border regions became uninhabited wilderness, but the Knights gained very little territory. The Lithuanians first gave up Samogitia during the Lithuanian Civil War (1381–84) 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 proposed to marry reigning Queen Jadwiga of Poland in the Union of Kreva. Jogaila converted to Christianity and was crowned as the King of Poland thus creating a personal union between the Kingdom of Poland and Grand Duchy of Lithuania. The official Lithuanian conversion to Christianity removed the religious rationale for the Order's activities in the area. However the Knights responded by publicly contesting the sincerity of Jogaila's conversion, bringing the charge to a papal court. The territorial disputes continued over Samogitia, which was in Teutonic hands since the Peace of Raciąż of 1404. Poland also had territorial claims against the Knights in Dobrzyń Land and Danzig (Gdańsk), but the two states were largely at peace since the Treaty of Kalisz (1343). The conflict was also motivated by trade considerations: the Knights controlled lower reaches of the three largest rivers (Neman, Vistula and Daugava) in Poland and Lithuania.
caption: Poland and Lithuania (1386–1434)
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