Charles de Blois held the duchy only by contest — his claim was disputed from the start by John de Montfort, triggering the War of Breton Succession that ran nearly the full length of this issue's production. English and French forces both intervened, and the duchy functioned as a proxy battleground for the Hundred Years' War. Charles was captured at La Roche-Derrien in 1347 and spent nine years as an English prisoner before ransoming his return, during which time his monetary output was necessarily disrupted.
He was killed at Auray in 1364, ending both his reign and the succession conflict decisively.
Charles de Blois held the duchy only by contest — his claim was disputed from the start by John de Montfort, triggering the War of Breton Succession that ran nearly the full length of this issue's production. English and French forces both intervened, and the duchy functioned as a proxy battleground for the Hundred Years' War. Charles was captured at La Roche-Derrien in 1347 and spent nine years as an English prisoner before ransoming his return, during which time his monetary output was necessarily disrupted.
He was killed at Auray in 1364, ending both his reign and the succession conflict decisively.