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The Battle of the Sit River was fought in the northern part of the present-day Yaroslavl Oblast of Russia on March 4, 1238 between the Mongol Hordes of Batu Khan and the Rus' people under George II of Vladimir-Suzdal during the Mongol invasion of Rus. After the Mongols sacked his capital of Vladimir, George fled across the Volga northward, to Yaroslavl, where he hastily mustered an army. His forces were completely exterminated, however, and George II died in the battle along with his nephew, Prince Vsevolod of Yaroslavl. The battle marked the end of unified resistance to the Mongols until Dmitri Donskoy, and inaugurated two centuries of the Mongol domination of Rus.