Issue of Edward III of England the Yorks left Richard III as king, supported and then betrayed by his cousin Buckingham, the descendant of Thomas of Woodstock. Finally, the Yorks were dislodged by the remaining Lancastrian candidate, Henry VII of the House of Tudor, another descendant of John of Gaunt, who married the eldest daughter of Yorkist King Edward IV. Edward, the Black Prince (15 June 1330 – 8 June 1376), Duke of Cornwall, Prince of Wales. The eldest son of Edward III who predeceased his father and never became king. Edward's only surviving child was Richard II who ascended to the throne but produced no
Edward III of England extraordinary circumstances of the April parliament had forced the king into submission, but under normal circumstances the powers of the king in medieval England were virtually unlimited, a fact that Edward was able to exploit. Historian Nicholas Rodger called Edward III's claim to be the "Sovereign of the Seas" into question, arguing there was hardly any Royal Navy before the reign of Henry V (1413–22). Despite Rodger's view, King John had already developed a royal fleet of galleys and had attempted to establish an administration for these ships and ones which were arrested (privately owned ships pulled into royal/national service).