History of the English penny (1154–1485) the continental price of silver, thus putting an end to the illegal export of English coinage. The heavy coinage was minted at London and York, inscribed – "Henry by the Grace of God King of England", while the light coinage was minted at London, York, and Durham, inscribed . Henry V (1413–1422) continued his father's light coinage, with similar inscriptions on the coins produced at London, Durham, and York. Henry VI (1422–1461, 1470–1471) came to the throne as an infant. He favoured making peace with France, but his heir, Richard, Duke of York, a descendant of the second son of
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