was succeeded by his son Henry of Monmouth, the Prince of Wales. Monmouth had replaced Erpingham as warden of the Cinque Ports in 1409, but relationships between the two men remained good, and after the coronation on 9 April 1413, Erpingham was appointed steward of the household, a post he held until at least 1415. After Henry IV's reign, which had been marked by banditry and rioting, Henry V acted quickly to restore law and order throughout the country. This was achieved within a year. Henry's administrators—Erpingham included—were unusually talented, and order was maintained in England throughout his reign. Henry's great-grandfather Edward III had lost Aquitaine in 1337 when it was confiscated from the English by Philip VI of France, and as a grandson of Philip IV of France, Edward had a claim to the French throne. In November 1414, Henry launched a campaign to recover Aquitaine and France. It was an effective way of establishing his authority as king at the start of his reign. Strategic planning for the expedition in February 1415 involved discussions with Erpingham and other soldiers in Henry's inner circle, part of what the historian Anne Curry describes as the King's "strong infrastructure and amply supply of manpower". Erpingham was indentured to serve as a knight banneret. His retinue, which mustered on heathland outside Southampton where they obtained provisions, consisted of two knights, 17 squires and 60 archers. Participation at Harfleur and Agincourt Erpingham crossed over from England to Normandy with Henry's army on 11 August 1415. The King's ship reached the mouth of the River Seine on 13 August, and the army landed from Harfleur, a landing point likely to have been decided on beforehand. Erpingham's men were present during the siege of the town, and on 22 September he led the procession to the walls and presided over the truce that led to its surrender. The English army then marched towards Calais, shadowed by the French, who forced them to divert away from the coast. The English successfully forded the River Somme at Voyennes; two days' march short of Calais, they were blocked by the French near Agincourt. Erpingham was one of the middle-aged English commanders on the field at Agincourt, and at 60 was one of the oldest men present. Although having never experienced a pitched battle before, he had taken part in lesser actions and, as noted by Curry, was "undoubtedly