Filled with fury and rage, Jeanne takes her two younger sons, Olivier and Guillame and heads to Nantes to show them their father’s head impaled on a lance and set on the city gates. She swears revenge to Charles de Blois and king Philip VI of France. She sells rest of the valuables, gather s400 loyal men and begins her crusade against France. She attacks the castle of Touffou, which was under the command of Galois de la Heuse, an officer of Charles de Blois. He allegedly recognized Jeanne and lets her in – after that her forces massacred the entire garrison, leaving only one wretch alive.
Soon after, with the help of the English king and Breton sympathizers, Jeanne organizes three warships, which are repainted black, their sails dyed blood red – and the flagship is christened with the name “My Vengeance.” Jeanne disguises herself as a pirate and goes to the sea with her Black Fleet. For the next 13 years, she hangs around the English Channel, spotting French merchant ships and attacking them without ruthlessness – always leaving one (un)lucky man alive to report to the French king that the Lioness of Brittany has caught up with them. And it was a tactic that can be described as guerrilla warfare at sea – disrupting the enemy’s logistics by attacking merchant ships, never military vessels.
In the end, however, the French manage to track down Jeanne and sink her flagship, so she drifts along with her sons for 5 days in troubled waters – as a result of this tragedy one of them, Guillame, dies. Jeanne and Olivier are eventually rescued by Jeanne’s allies, the de Montforts – and the Lioness of Brittany continues her pirate expeditions. In 1350, Jeanne marries for the last time – to Walter Bentley, closely related to King Edward III. They settled at Hennebont Castle and lived in relative peace for the next couple of years (not counting Walter’s little squabble with King Edward III over Jeanne’s estates). In December 1359 Walter dies, and a few weeks after him Jeanne – leaving behind a clear message: do not make baseless accusations of treason and do not desecrate the corpse – or the Black Fleet will catch up with you. Got it?