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Henry IV (c. April 1367 – 20 March 1413), also known as Henry Bolingbroke, was King of England from 1399 to 1413. Henry's grandfather Edward III had begun the Hundred Years War by claiming the French throne in opposition to the House of Valois, a claim that Henry would continue during his reign. However, unlike his forebears, Henry was the first English ruler whose mother tongue was English rather than French, since the Norman Conquest, over three hundred years before.Henry was the son of John of Gaunt, Duke of Lancaster, himself the son of Edward III. Gaunt was a powerful figure in England during the reign of his nephew, Richard II. Henry was involved in the 1388 revolt of Lords Appellant against Richard, but he was not punished. However, he was exiled from court in 1398. After Gaunt died in 1399, Richard blocked Henry's inheritance of his father's duchy. That year, Henry rallied a group of supporters, overthrew and imprisoned Richard II, and usurped the throne, actions that later would lead to what is termed the Wars of the Roses and, eventually, a more stabilized monarchy.
As king, Henry faced a number of rebellions, most seriously those of Owain Glyndŵr, the last Welsh Prince of Wales, and the English knight Henry Percy (Hotspur), who was killed in the Battle of Shrewsbury in 1403. Henry IV had six children from his first marriage to Mary de Bohun, while his second marriage to Joan of Navarre was childless. Henry and Mary's eldest son, Henry of Monmouth, assumed the reins of government in 1410 as the king's health worsened. Henry IV died in 1413, and his son succeeded him as Henry V.