Salisbury became Warden of the West March in 1420. It was one of the most valuable appointments in England, worth £1,500 in peacetime and four times that if war broke out with Scotland. Although, unlike Calais, it did not require a permanent garrison, the incessant raiding and border skirmishes meant that there would always be a ready supply of trained and experienced soldiers at the Warden's command. Salisbury must have been high in Henry V's estimation, as he was also appointed Justice of the Peace in Cumberland, Westmoreland, and Durham. In 1431 he accompanied the young King Henry VI to France for his coronation, and on his return was made Warden of the East March.