Kingdom of Arles
Margaret of Provence called Robert and Otto of Burgundy and other lords who held fiefs in the Kingdom of Arles to a meeting at Troyes in the autumn of 1281. They were willing to unite their troops to prevent Charles' army from taking possession of the kingdom, but Philip III of France strongly opposed his mother's plan and Edward I of England would not promise any assistance to them. Charles acknowledged that his wife held the County of Tonnerre and her other inherited estates as a Burgundian fief, which appeased Robert of Burgundy. Charles' ships started to assemble at Marseilles to sail up the Rhone in the spring of 1282. Another fleet was gathering at Messina to start the crusade against the Byzantine Empire.