Already distinguished as a soldier in the Italian Wars, Charles was appointed constable of France by Francis I of France in 1515, and was rewarded for his services at the Battle of Marignano (where he commanded the vanguard) with the Governorship of Milan. However, Francis was uneasy with the proud and wealthy duke, and soon recalled him from Milan and refused to honor his debts. Charles was further angered by the appointment of Charles IV of Alençon, Francis's brother-in-law, as commander of the vanguard during the campaigns in the Netherlands, an office which should have been his.