Louis, on becoming king, had loaded James d'Armagnac with favors; had raised his countship of Nemours to a duchy-peerage of France; had married him to Louise of Anjou, daughter of the Count of Maine and niece of King Rend.

The new Duke of Nemours entered, nevertheless, into the League of Common Weal against the king.

Having been included, in 1465, with the other chiefs of the league in the treaty of Conflans, and reconciled with the king, the Duke of Nemours made oath to him, in the Sainte-Chapelle, to always be to him a good, faithful, and loyal subject, and thereby obtained the governorship of Paris and Ile-de-France.

But, in 1469, he took part in the revolt of his cousin, Count John d'Armagnac, who was supposed to be in communication with the English; and having been vanquished by the Count de Dampmartin, he had need of a fresh pardon from the king, which he obtained on renouncing the privileges of the peerage if he should offend again.

He then withdrew within his own domains, and there lived in tranquillity and popularity, but still keeping up secret relations with his old associates, especially with the Duke of Burgundy and the constable of St.Pol.