The Siege of Kiev by the Mongols took place between 28 November and 6 December 1240, and resulted in a Mongol victory. It was a heavy morale and military blow to the Principality of Galicia–Volhynia, which was forced to submit to Mongol suzerainty, and allowed Batu Khan to proceed westward into Central Europe.
HistoryLayer draws the world as it was in any year from 123,000 BCE to
2026. Move the slider and the borders redraw for that year; the map
carries 23,890 events, 12,790 people, 837 wars and 13,183 cities, each
one readable in place. Signing in is optional and lets you keep what
you find.