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After the ... conquest, the territories of the ... Rus became part of the Mongol ... also known as Golden Horde. The numerous ... principalities became the Horde’s tributaries. During this period, the small regional principality of ... was growing in power and was often challenging its neighbours over ... . On the 8th of September 1380, the battle between the armies of the Golden Horde under the command of ... and the Russian principalities under the united command of ... , the Prince of Moscow, took place at the field near the ... river. The Prince of Moscow won the battle over Mamai. Although his victory did not end the Mongol rule over the Russian principalities, Russian historians call it the turning ... when Mongol influence on Moscow began to fail.