[2] He was the son and successor of Frederick IV, Duke of Lorraine and Elisabeth of Austria, the daughter of King Albert I of Germany of the House of Habsburg.

[3] Though he was but nine years of age when his father died and he succeeded to the duchy under the regency of his mother (until 1334), he was a warrior prince, taking part in four separate wars in Lorraine, France, Brittany, and Iberia.

During a brief Anglo-French peace, he journeyed to the Iberian Peninsula to aid King Alfonso XI of Castile in the Reconquista.

[5] On his return to France, he came to the aid of his French brother-in-law, Charles, Duke of Brittany, in the War of the Breton Succession.

He returned to King Philip's side at the Battle of Crécy and was killed there, along with many illustrious French cavaliers on 26 August 1346.