Treaty of Andrusovo

Background. The conflict originated from the Polish-Russian War of 1654–1667, a major struggle between the Tsardom of Russia and the Polish-Lithuanian Commonwealth. The war involved significant territorial disputes, including the siege of Smolensk and conflicts over Ukrainian territories, culminating in prolonged peace negotiations.

Negotiations and Signing. Peace negotiations dragged on from 1664 until January 1667, when internal civil war pressured the Poles and Lithuanians to conclude the treaty. The truce was signed on 9 February [O.S. 30 January] 1667 in the village of Andrusovo, near Smolensk, by representatives of both states.

Territorial Terms. The treaty established a thirteen-and-a-half year truce. Russia secured the territories of Left-bank Ukraine, Siever lands, and Smolensk. Poland-Lithuania retained Right-bank Ukraine and Russian-occupied Belarus, including Vitebsk, Polotsk, and Dzwinsk. A financial compensation of 1,000,000 złotych was agreed for the ceded lands.

Consequences. The treaty marked a significant shift in the balance of power in Eastern Europe. From the Polish perspective, it was a mistake that replaced Poland as the dominant state with the emerging Russian Empire. In the long term, it greatly weakened Poland and left it increasingly vulnerable to Russian incursions.