Edmund Beaufort (died 1471) his elder brother Henry Beaufort, 3rd Duke of Somerset, Edmund is said to have succeeded as 4th Duke by Lancastrians in February 1471, but his brother's attainder was never reversed, and his titles remained forfeit. In a proclamation dated 27 April 1471 Edmund is spoken of as "Edmund Beaufort, calling himself duke of Somerset". In October 1470 Beaufort returned from France when King Edward IV was driven from the throne after the Earl of Warwick's defection and alliance with Queen Margaret and the restoration of King Henry VI, who was the first monarch ousted by the family feud, and whom
Cham–Vietnamese War (1471) and once their economies recovered, these two kingdoms went to war again. When fighting resumed in 1471, the Champa kingdom found itself weakened and isolated. It has experienced numerous civil wars and, at one point, had five different rulers. For its earlier attack on Angkor, the Khmers ignored the Cham's request for assistance when Vietnam invaded. The Cham also requested Ming China to intervene by helping bring the Vietnamese back in line by force and demarcate the border between Champa and Vietnam. China, however, only verbally rebuked the Vietnamese for its incursion, which the Vietnamese ignored, proceeding with its attack