The Battle of Orsha, was a battle fought on 8 September 1514, between the allied forces of the Grand Duchy of Lithuania and the Crown of the Kingdom of Poland, under the command of Lithuanian Grand Hetman Konstanty Ostrogski; and the army of the Grand Duchy of Moscow under Konyushy Ivan Chelyadnin and Kniaz Mikhail Bulgakov-Golitsa. The Battle of Orsha was part of a long series of Muscovite–Lithuanian Wars conducted by Muscovite rulers striving to gather all the former Kievan Rus' lands under their rule. The battle halted Muscovy's expansion into Eastern Europe.

Ostrogski's forces continued their pursuit of the routed Russian army and retook most of the previously captured strongholds, including Mstislavl and Krychev, and the advancement of the Russians was stopped for four years. However, the Lithuanian and Polish forces were too exhausted to besiege Smolensk before the winter. This meant that Ostrogski did not reach the gates of Smolensk until late September, giving Vasili III enough time to prepare defense.