In 1350, Henry was present at the naval victory at Winchelsea, where he saved the life of the Black Prince. He spent 1351–2 on crusade in Prussia where a quarrel with Otto, Duke of Brunswick, almost led to a duel between the two men, which was only averted by the intervention of John II of France. As campaigning in France resumed, Henry participated in the last great offensive of the Rheims campaign of 1359–60the first phase of the Hundred Years' Warbefore returning to England where he fell ill and died, most likely of the plague, at Leicester Castle.
