Muscovite–Lithuanian Wars

The Muscovite–Lithuanian Wars (also known as the Russo-Lithuanian Wars or simply Muscovite Wars or Lithuanian Wars) were a series of wars between the Grand Duchy of Lithuania (in the later wars allied with the Kingdom of Poland) and the Grand Duchy of Moscow, which was later unified with other Russian principalities to eventually become the Tsardom of Russia. After several defeats at the hands of Ivan III and Vasily III, the Lithuanians were increasingly reliant on Polish aid, which eventually became an important factor in the creation of the Polish–Lithuanian Commonwealth.

Source: Wikipedia — Muscovite–Lithuanian Wars (CC BY-SA 4.0)