Events

• January – The Mongol Army under Jochi captures the city of Gurganj (now Kunya-Urgench), and massacres the inhabitants, reported by contemporary scholars as being over a million killed, although probably only a fifth or a tenth of that in reality.

• February – Merv is sacked by the Mongols under Tolui at the orders of Genghis Khan. Contemporary scholars report over a million people are systematically killed in the aftermath.

• May 13 – Emperor Juntoku is briefly succeeded by Emperor Chūkyō on the throne of Japan.

• Former Emperor Go-Toba leads an unsuccessful rebellion against the Kamakura Shogunate.

• Emperor Go-Horikawa ascends to the throne of Japan.

• The Maya of the Yucatán revolt against the rulers of Chichen Itza.

• Nizhny Novgorod City (Russia) is founded.

• A large and highly efficient Mongol army, dispatched under Subutai by Genghis Khan to Georgia, defeats two Georgian armies around Tbilisi, but lacks the will or equipment to besiege the city.

• Genghis Khan enters the Indus Valley.

• Holy Roman Emperor Frederick II founds the University of Padua in Italy.

• Sultan Kamil, Saladin's son and successor, offers Palestine to the Crusaders in return for Damietta, which the Crusaders eventually give up in exchange for a safe retreat from the Nile Delta.

• Majd al Mulk al-Muzaffar, the grand vizier of Greater Khorasan, is killed by Mongol invaders.

Births

• October 9 – Salimbene di Adam, Italian chronicler

• November 23 – King Alfonso X of Castile (d. 1284)

• Bonaventure, Italian theologian and saint (d. 1274)

• Boleslaus the Pious, Duke of Greater Poland (d. 1279)

Deaths

• August 6 – Saint Dominic, Spanish founder of the Dominicans (b. 1170)

• October 4 – William III Talvas, Count of Ponthieu (b. 1179)

• October 21 – Alix of Thouars, Duchess of Brittany (b. 1201)

• Roger Bigod, 2nd Earl of Norfolk