Mongol Invasion of Europe
Also called: Mongol invasion of Rus, Founding of the Golden Horde
Genghis Khan’s grandson Batu destroyed Volga Bulgaria and the Rus principalities and struck as far as Poland and Hungary. On the death of Ögedei he withdrew and founded the Golden Horde.

Anonymous Russian manuscript illuminators, 1560-1570s Facial Chronicle (Illustrated Chronicle of Ivan the Terrible) (in 10 volumes: pdf , pdf with translation ) Public domain image · Public domain · Source
Following the kurultai of 1235, a Mongol army under Batu and Subutai destroyed Volga Bulgaria in 1236, overran Ryazan, Vladimir and the rest of northeastern Rus in 1237–1238 and took Kyiv in December 1240. In 1241 it split to strike Poland and Hungary, winning great victories at Legnica and Mohi. But when news of Ögedei’s death late in 1241 arrived, the army turned back in 1242. Batu founded the Golden Horde with its capital at Sarai on the Volga, and the Rus principalities lived under its overlordship — the "Tatar yoke" — for over two centuries.