Russia then suffered a series of defeats in the field. In 1512, Grand Hetman of Lithuania, Konstanty Ostrogski, ravaged Severia and defeated a 6,000-strong Russian force. On 8 September 1514, the Russians suffered a major defeat at the Battle of Orsha. Despite their victory, his army was unable to move quickly enough to recapture Smolensk. In 1518, Russian forces were beaten during the siege of Polotsk, when according to legend the Lithuanian forces were inspired by the sight of their patron saint, Saint Casimir. The Russians invaded Lithuania again in 1519, raiding Orsha, Mogilev, Minsk, Vitebsk, and Polotsk.