1238

Events

Europe

* March 4 - Mongol invasion of Rus - Battle of the Sit River: The Mongol Hordes of Batu Khan defeat the Rus' under Yuri Vsevolodovich of Vladimir-Suzdal.
* August 21 - Battle of Örlygsstaðir: Sighvatur Sturluson and Sturla Sighvatsson defeat Kolbeinn ungi Arnorsson and Gissur Thorvaldsson for control of Iceland.
* September 28 - James I of Aragon captures the city of Valencia from the Moors, who retreat to Granada.
* The seat of the patriarchate of Aquileia is transferred to Udine.
* Simon de Montfort marries Eleanor, sister of Henry III of England.
* The Mongols seize Moscow, at the time a small town.
* Peterborough Cathedral is consecrated.

Asia

* The Khmers are expelled from Luang Phrabang in Laos.
* The Sukhothai kingdom is founded in Thailand.

Births

* Nizamuddin Auliya, Indian Sufi saint (d. 1325)
* Theobald V of Champagne (approximate date; d. 1270)
* Frederick III, Duke of Lorraine (d. 1302)
* Meinhard II of Gorizia-Tyrol (d. 1295)
* Shri Madhvacharya, Vaishnavite saint and founder of the Dvaita School (d. 1317)
* Henry de Montfort, son of Simon de Montfort, 6th Earl of Leicester (d. 1265)
* Magnus Lagabøte, king of Norway (d. 1280)

Deaths

* March 4 - Joan of England, Queen consort of Scotland, wife of Alexander II of Scotland (b. 1210)
* March 4 - Prince Yuri Vsevolodovich of Vladimir-Suzdalia (b. 1189)
* March 19 - Duke Henry I of Poland (b. 1163)
* Al-Kamil, Ayyubid sultan of Egypt
* Hugh le Despenser I, English nobleman
* Peter des Roches, bishop of Winchester