In 1342 he became captain for the king of France in Brittany; then he seems to have served in the household of the duke of Normandy, and in 1346, as one of the defenders of Calais, was taken as a prisoner to England by Edward III.

In March 1352 he was appointed lieutenant for the king in the territory between the Loire and the Dordogne, in 1353 in Normandy, and in 1355 in Artois and Picardy and the Boulonnais.

At Poitiers he was one of those who advised John II of France to attack the English, and, charging into the front line of the French army, was slightly wounded and taken prisoner.

[1] In 1365 he joined Bertrand du Guesclin in the expedition to Spain, and was taken prisoner with him by Edward, the Black Prince at the Battle of Nájera (Navarette) in 1367.

To this d'Audrehem agreed, and after he had dined the prince chose twelve knights, four English, four Gascons, and four Bretons, to judge between himself and the marshal.