August 4 - The Battle of Evesham of the Second Barons' War is fought in Worcestershire, with the army of Edward defeating the forces of rebellious barons led by Simon de Montfort and killing de Montfort and many of his allies. This is sometimes considered the death of chivalry in England.
In the first major battle in 5 years since the Song DynastyChinese pushed the forces of Kublai Khan back across the Yangzi River after Mongke Khan's failed invasion in 1259, Kublai Khan engages the Chinese in Sichuan province. Kublai gains a preliminary victory and war booty of 146 captured Song Dynasty naval ships.