In early 1370 Pembroke was nominated for the Order of the Garter, and his Order Robes were ordered for him, according to government accounts, on 12 March. This timing allowed him to attend the order's annual feast in April. He took the stall of the deceased Thomas, Earl of Warwick. The same year he accompanied the Black Prince—who was by now suffering from the illness that was to kill him—in a major campaign against Limoges. Before commencing the attack, Pembroke accompanied the Prince (by now so ill that he could not stand), being conveyed on a litter – to Cognac, where the Prince's younger brother, John of Gaunt, Duke of Lancaster was due to arrive in September 1370. Notably, one of Gaunt's closest advisors was Walter, Baron Manny, Pembroke's father-in-law. Mauny had already been directing much of the English campaign from London, and was "no doubt frustrated to find himself dictating strategy to Pembroke from Westminster;" and when Gaunt eventually arrived, Pembroke's father-in-law arrived with him. Limoges was captured after a five-day siege in which the English successfully mined the city's walls. Following its capture in October 1370, the town was sacked and many inhabitants were killed.; Pembroke appears to have taken full part in these events, dishing out harsh treatment to the occupants. He may even have engaged the captains of the town's garrison in personal combat.