The Muscovite–Lithuanian Wars (also known as Russo-Lithuanian Wars, or just either Muscovite Wars or Lithuanian Wars) were a series of wars between the Grand Duchy of Lithuania, allied with the Kingdom of Poland, and the Grand Duchy of Moscow. 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.