John of Gaunt John of Gaunt John of Gaunt, Duke of Lancaster (6 March 13403 February 1399) was an English prince, military leader, and statesman. He was the third of the five sons of King Edward III of England who survived to adulthood. Due to his royal origin, advantageous marriages, and some generous land grants, Gaunt was one of the richest men of his era, and an influential figure during the reigns of both his father, Edward, and his nephew, Richard II. As Duke of Lancaster, he is the founder of the royal House of Lancaster, whose members would ascend to the throne
Monarchy of the United Kingdom John of Gaunt, Duke of Lancaster; hence, his dynasty was known as the House of Lancaster. For most of his reign, Henry IV was forced to fight off plots and rebellions; his success was partly due to the military skill of his son, the future Henry V. Henry V's own reign, which began in 1413, was largely free from domestic strife, leaving the king free to pursue the Hundred Years' War in France. Although he was victorious, his sudden death in 1422 left his infant son Henry VI on the throne and gave the French an opportunity to overthrow English