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 Aquil… (More on 1238)