9 events the sources record for this year, grouped by region.
What happened
China (2)
The monk Liu Bingzhong (Zicong) divined a site north of Huanzhou and east of Nanshui, and built the walls of Kaiping and the palaces. (History of Yuan (Yuanshi), Annals 元史 卷4 世祖 1256年 3月)
In the twelfth month Wuliangheta left Wuman, crossed the Nu River, broke three cities of Tula and seized two hundred Song boats, passed through Jiading and Chongqing to Hezhou, crossed the Shu River and joined Wang Dechen and others. (Xu Zizhi Tongjian (Continuation of the Comprehensive Mirror) 권175 十二月 단락175.17.1)
Korean Peninsula (1)
The Mongol army enters Chungju, massacres the walled town, and attacks the mountain fortress; the officials, the weak and the old flee to the shrine on Woraksan. (Goryeosa (History of Goryeo) 世家 卷24 高宗 四十三年)
Southern Europe (1)
The Roman senator Brancaleone was seized and imprisoned on the grounds that he enforced justice too strictly. (Chronica Majora of Matthew Paris l.2084–2086 (같은 일 l.1088 「Captus est senator Romanorum et incarceratus」))
Western Europe (4)
A peace was again concluded between Flanders and Germany (the OCR reading 'Ahmannos' is read as Alemannos). (Chronica Majora of Matthew Paris l.1890)
Manfred won a war against the pope and took the coastal cities including Naples and Barletta; the pope began to seek a peace settlement. (Chronica Majora of Matthew Paris l.2675–2680)
The Flemish count, held captive, was being kept by citizens; the Savoyard party and the pope worked for his release, and the pope wrote to the English queen against the citizens. (Chronica Majora of Matthew Paris l.3795–3798)
Eastern Europe & Russia (1)
The Swedes, Emi and Sum build a fortress on the Narva river; hearing of Novgorod, they flee across the sea. (Novgorod First Chronicle litopys 기사 1256년)