Sviatoslav III, Prince (Principality of Smolensk) : All Data

Sviatoslav III was a prince who ruled over the Principality of Smolensk from 1236 to 1240. During his tenure, he faced significant challenges, including the Mongol invasion of Rus. In 1237, the Mongols launched a devastating campaign known as the Mongol Invasion of Rus, which lasted until 1240. This war resulted in the fall of numerous Russian principalities, including Smolensk, to the Mongol Empire. Sviatoslav III's reign was marked by his efforts to defend his principality against the Mongol forces, but ultimately, he was unable to withstand their overwhelming power.