During nine years, from 1347 to 1356, the two Joans were the two heads of their parties in politics and in war.

Charles of Blois at last obtained his liberty from Edward III.

on hard conditions, and returned to Brittany to take up the conduct of his own affairs.

The struggle between the two claimants still lasted eight years, with vicissitudes ending in nothing definite.

In 1363 Charles of Blois and young John of Montfort, weary of their fruitless efforts and the sufferings of their countries, determined both of them to make peace and share Brittany between them.