Mongol invasion of Rus'
Mstislav Mstislavich the Daring (, ; died c. 1228) prince of Tmutarakan and Chernigov, was one of the most popular and active princes of Kievan Rus' in the decades preceding the Mongol invasion of Rus'. He was the maternal grandfather of Prince Alexander Nevsky, Prince of Novgorod, Grand Prince of Kiev and Grand Prince of Vladimir. He also was the maternal grandfather of prince Leo of Galicia, who became Grand Prince of Kiev.