Treaty of Dovydiškės

The Treaty of Dovydiškės (Lithuanian: Dovydiškių sutartis; German: Vertrag von Daudisken), Daudiske, or Daudisken was a secret treaty signed on 31 May 1380 between Jogaila, the Grand Duke of Lithuania, and Winrich von Kniprode, the Grand Master of the Teutonic Knights.

[2] However, the truce protected only Christian lands in the south, thus Kęstutis' pagan realms in northern and western Lithuania were still vulnerable to Teutonic attacks.

Some theories claim that the treaty was signed somewhere between Kaunas and Insterburg or that the village was named Šiaudiniškė (Szaudiniszki).

Based on the terms of the accord, Jogaila agreed not to intervene during attacks by the Teutonic Knights against Kęstutis or his children.

[7] Historians noted that the treaty was somewhat superfluous as Jogaila's lands were protected by the ten-year Truce of Trakai, signed in 1379.

[8] Jogaila, having secured his western front, directed his attention to the east, where he allied himself with the Golden Horde for the upcoming Battle of Kulikovo against the Grand Duchy of Moscow.

[1] While raiding towards Trakai, the Teutonic Knights used bombards for the first time[11] and destroyed Naujapilis taking some 3,000 prisoners.

An internal war erupted which ended in Kęstutis' death in the Kreva Castle and Vytautas' reconciliation with Jogaila in 1384.