The Welsh national leader Owen Glendower (ca. 1359-ca.1415) led Welsh opposition to English rule during the early 1400s.

Owen Glendower, also known as Owain ap Gruffydd and Glyndyfrdwy, Lord of Glyndwr and Sycharth, claimed descent from Bleddyn ap Cynvyn and from Llewelyn ap Gruffydd, the last native Prince of Wales. After inheriting estates in Merioneth, Glendower probably studied law at one of the Inns of Court in London. By 1385 he was serving as a squire with King Richard II against the Scots. Possibly knighted in 1387, he also served the Earl of Arundel under Henry of Lancaster (who became Henry IV in 1399). Glendower headed a Welsh rebellion in 1399, and, after being captured at Flint Castle, he was pardoned, but some of his lands were not restored to him. After an unsuccessful appeal to Parliament, Glendower turned to rebellion and in 1400 took the title of Prince of Wales.

As a...