May 31- History, Events, Births, Deaths, Holidays and Observances On This Day
May 31 in History
455 – Emperor Petronius Maximus is stoned to death by an angry mob while fleeing Rome.
1223 – Mongol invasion of the Cumans: Battle of the Kalka River: Mongol armies of Genghis Khan led by Subutai defeat Kievan…