Bertrand du Guesclin (d. 1380) was the most famous French soldier of his generation. He made his name as a guerrilla leader in the Breton War of Succession (1341-64) and, as Constable from 1370-80, played a major role in the recovery of France under Charles V. Captured on at least three occasions, but also victorious in several important battles, his valour and dominant personality allowed him to exercise remarkable influence. He twice led important expeditions to Spain where he was rewarded with lands and titles by the kings of Aragon and Castile. A contemporary chivalric verse-life lies at...