Ukraine
In 1240, they attacked Kyiv.  The city was plundered and destroyed. According to the legend, the enemy saved governor Dimitri's life for his personal courage in the battle. Then Kamenetz, Iziaslav, Volodymyr, and Halych lost against invaders.  Batu was able to attach most of Rus to his empire, the Golden Horde, which covered the whole territory from the Urals to the Black Sea,