 In 1444, he led an army of "écorcheurs" (bands of mercenary soldiers) against the Swiss at the Battle of St. Jakob an der Birs and was impressed by the latter's military might.He still quarreled with his father, however, and his objectionable scheming, which included disrespectful behavior directed against his father's beloved mistress Agnès Sorel, caused him to be ordered out of court on 27 September 1446 and sent to his own province of Dauphiné.He lived mainly in Grenoble, in the "tour de la Trésorerie".