In England, the Yorkists under Edward IV defeat the Lancastrians under the Earl of Warwick at the Battle of Barnet; the Earl is killed and Edward resumes the throne.

The House of York was a cadet branch of the English royal House of Plantagenet. It fought with the House of Lancaster, another cadet branch of the House of Plantagenet, for the English crown in the second half of the 15th century. The differences ultimately led to the Wars of the Roses. These wars…