TheTruce orTreaty of Yam-Zapolsky (Ям-Запольский) orJam Zapolski, signed on 15 January 1582 between thePolish–Lithuanian Commonwealth and theTsardom of Russia, was one of the treaties that ended theLivonian War.[1] It followed the successfulLivonian campaign of Stephen Báthory, culminating in thesiege of Pskov.
The truce was concluded with help ofpapal legateAntonio Possevino and was signed for the Polish–Lithuanian Commonwealth by King of Poland and Grand Duke of LithuaniaStefan Batory and for Russia byTsarIvan the Terrible, and established a ten-yeartruce.
In the terms of the treaty, Russia renounced its claims toLivonia andPolotsk but conceded no core Russian territories as Batory returned the territories his armies had been occupying (particularly, he gave up on thesiege of Pskov and left the town ofVelikiye Luki. Thetruce was extended for twenty years in 1600, when adiplomatic mission to Moscow led byLew Sapieha concluded negotiations with TsarBoris Godunov. The truce was broken whenthe Poles invaded Russia in 1605.
One of the principal negotiators on the Polish side wasKrzysztof Warszewicki.[2]
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