Polish–Russian War (1654–1667)
The Polish–Russian War of 1654–1667 was a major conflict between the Tsardom of Russia and the Polish–Lithuanian Commonwealth. Between 1655 and 1660, the Swedish invasion was also fought in the Polish–Lithuanian Commonwealth and so the period became known as "The Deluge".
The Commonwealth initially suffered defeats, but it regained its ground and won several decisive battles. However, its plundered economy was not able to fund the long conflict. Facing internal crisis and civil war, the Commonwealth was forced to sign a truce. The war ended with significant Russian territorial gains and marked the beginning of the rise of Russia as a great power in Eastern Europe.