The Mongols retreated, having gathered their intelligence which was the purpose of the reconnaissance-in-force. A full-scale invasion of Rus' by Batu Khan followed, from 1237 to 1242.
Battle of Kulikovo, (Sept. 8, 1380), military engagement fought near the Don River in 1380, celebrated as the first victory for Russian forces over the Tatars of the Mongol Golden Horde since Russia was subjugated by Batu Khan in the thirteenth century.