Archambaud of Grailly

Archambaud's father, however, joined the service of King Edward III of England and was employed with the governorship in the south of the Guyenne (Capitalate de Buch), where the Grailly family proved themselves loyal in the Hundred Years' War against France.

A little later, Archambaud fought, together with his nephew, Jean III de Grailly, on 19 September 1356, at the victorious Battle of Poitiers, where the King of France, John II was captured by the English.

In the following years the Graillys were involved in the defence of the conquered territories, which the French Bertrand du Guesclin was attempting to regain.

Archambaud became, co-regent of the County of Foix suo uxoris, viscount of Béarn, Marsan, Lautrec, and Castelbon, as well as co-prince of Andorra.

Thereofore the French Connétable de Sancerre marched into the County of Foix with an army and occupied large parts of it.

Similarly, descendants of Archambaud were to bear the names and arms of the family of his wife, dropping those of the House of Grailly.