In 1329, he was named Constable of France,[2] and he also held the office of Governor of Languedoc.

The Count of Eu commanded French forces during the opening stages of the Hundred Years' War, as befit his rank of Constable.

However, he proved to be a poor commander and "a man of very limited talent", according to Lord Sumption.

The daughter of Dreux VI de Mello, she was the heiress to a rich Burgundian barony.

[1] They had three children: He was killed in a tournament being held in honour of the marriage of Philip, Duke of Orléans and Blanche of France, and was succeeded by his son Raoul.