Treaty of Salynas

Treaty of Salynas (German: Frieden von Sallinwerder, Lithuanian: Salyno sutartis) was a peace treaty signed on 12 October 1398 by the Grand Duke of Lithuania Vytautas the Great and the Grand Master of the Teutonic Knights Konrad von Jungingen. It was signed on an islet of the Neman River, probably between Kulautuva and the mouth of the Nevėžis River. It was the third time, after the Treaty of Königsberg (1384) and Treaty of Lyck (1390), that Vytautas promised Samogitia to the Knights. The territory was important to the Knights as it physically separated the Teutonic Knights in Prussia from its branch in Livonia. It was the first time that the Knights and Vytautas attempted to enforce the cession of Samogitia. However, it did not solve the territorial disputes over Samogitia and they dragged on until the Treaty of Melno in 1422.

When Grand Duke of Lithuania Jogaila married Jadwiga of Poland and was crowned as King of Poland in 1386, he appointed his unpopular brother Skirgaila as viceroy for Lithuania. Vytautas seized the opportunity to renew his struggle for power and started the Lithuanian Civil War (1389–92). He allied himself with the Teutonic Knights, promising them Samogitia. However, Jogaila and Vytautas reconciled in 1392 by signing the Treaty of Astrava. The Knights, betrayed by Vytautas, invaded Lithuania in 1394 and unsuccessfully besieged Vilnius for three weeks. The invaders were driven away by joint Lithuanian and Polish forces demonstrating that the old raids were no longer effective against the new Polish–Lithuanian alliance. A truce between the Knights and Vytautas was signed in 1396. Vytautas needed to secure his western front as he was planning a massive campaign against the Golden Horde, which resulted in a disaster at the Battle of the Vorskla River in 1399.

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