Summer – Geoffrey II ("the Hammer"), count of Anjou, captures the city of Tours, and takes control of the county of Touraine.
Asia
The Chinese military treatise of the Wujing Zongyao is written and compiled by scholars Zeng Gongliang (曾公亮), Ding Du (丁度), and Yang Weide (楊惟德), during the Song dynasty. It is the first book in history to include formulas for gunpowder, and its use for various bombs (thrown by sling or trebuchet catapult). It also describes the double-piston pump flamethrower and a thermoremanence compass, a few decades before Shen Kuo wrote of the first known magneticmariner's compass. Although emphasizing the importance of many weapons, it reserves high respect for the crossbow, and the ability of crossbowmen to fell charging units of nomadiccavalrymen.