May 15 - Battle of Hexham: Montague defeats another Lancastrian army, this one led by King Henry and Queen Margaret themselves. This marks the end of organized Lancastrian existence for several years.
Jehan Lagadeuc writes a Breton-French-Latin dictionary called the Catholicon. It's the first French dictionary as well as the first Breton dictionary of world history, and it will be published in 1499.
In China, a small rebellion occurs in the interior province of Huguang, during the Ming Dynasty; a subsequent rebellion springs up in Guangxi, where a rebellion of the Miao people and Yao people forces the Ming throne to respond by sending 30,000 troops (including 1,000 Mongol cavalry) to aid the 160,000 local troops stationed in the region to crush the rebellion that will end in 1466.