History of England power to succeed the current ruler of France, Charles VI of France. The Treaty also provided that he would marry Charles VI's daughter, Catherine of Valois. They married in 1421. Henry died of dysentery in 1422, leaving a number of unfulfilled plans, including his plan to take over as King of France and to lead a crusade to retake Jerusalem from the Muslims. Henry V's son, Henry VI, became king in 1422 as an infant. His reign was marked by constant turmoil due to his political weaknesses. While he was growing up, England was ruled by the Regency government. The
Henry IV of England his nephew King Richard II (1377-1399) whom Henry eventually deposed. Henry's mother was Blanche of Lancaster, heiress to the great Lancashire estates of her father Henry of Grosmont, 1st Duke of Lancaster (a descendant in the male line of King Henry III). Henry, having succeeded his father as 2nd Duke of Lancaster, when he became king thus founded the Lancaster branch of the Plantagenet English monarchy. He was also the first King of England since the Norman Conquest whose mother tongue was English rather than French. One of Henry's elder sisters, Philippa of Lancaster, married King John I of Portugal,