The Mongol invasions of Lithuania was an event where the Mongol armies invaded the territories of the Kingdom of Lithuania and later, the Grand Duchy of Lithuania, on several occasions in late 13th and early 14th century. The event was not very well documented, but historians knew also that despite occasional setbacks, which likely forced the Lithuanian state and its neighbors the Yotvingians to become client states of Mongols for a short period, the Lithuanians were able to take control of a number of formerly Mongol territories in the long run.