8th April » Mongol conquest of the Jin Dynasty Mongol–Jin War: The Mongol Empire Mongols begin their Mongol siege of Kaifeng siege on Kaifeng, the capital of the Jin Dynasty (1115–1234) Jin Dynasty.
27th August » The Goseibai Shikimoku Formulary of Adjudications is promulgated by Shikken Regent Hōjō Yasutoki. (Traditional Japanese calendar Japanese date: August 10, 1232)