The Battle of Auray (September 29, 1364):…

September 1364 CE

The Battle of Auray (September 29, 1364): The Decisive End of the Breton War of Succession

The Battle of Auray, fought on September 29, 1364, was the final and decisive battle of the Breton War of Succession (1341–1364). The pro-English Montfortists, led by John IV de Montfort and the English commander John Chandos, decisively defeated the Franco-Breton forces of Charles of Blois and Bertrand du Guesclin, ending the decades-long conflict.

Prelude to the Battle: The Siege of Auray

John IV de Montfort, now a mature leader backed by England, moved to besiege Auray with the assistance of John Chandos, one of England’s most skilled commanders.
The pro-French forces, led by Charles of Blois and Bertrand du Guesclin, marched to relieve the besieged city, setting the stage for a climactic battle.

The Battle of Auray (September 29, 1364)

The Montfortist army, composed of Breton, English, and Gascon forces, was well-disciplined and tactically superior.
The Bloisist army, reinforced by French troops and Breton nobles, took up strong defensive positions but lacked cohesion.
John Chandos and John IV de Montfort positioned their forces carefully, utilizing archers and cavalry to great effect.
In the fierce battle that followed:
- Charles of Blois was killed in combat, delivering a fatal blow to the Bloisist cause.
- Bertrand du Guesclin was captured, later ransomed by King Charles V for 100,000 francs.

Aftermath: The End of the Breton War of Succession

With Charles of Blois dead, his widow, Joan of Penthièvre, saw her claim to the Duchy of Brittany collapse.
John IV de Montfort emerged as the undisputed Duke of Brittany, solidifying his rule through the Treaty of Guérande (1365), which recognized him as the rightful duke under the vassalage of the French king.
This English-backed victory expanded English influence in Brittany, though John IV remained politically pragmatic, later balancing alliances between England and France.

Legacy and Impact

The Battle of Auray decisively ended the Breton War of Succession, securing Montfortist dominance over Brittany for generations.
Bertrand du Guesclin’s ransom and later release allowed him to rise to even greater prominence, becoming Constable of France under Charles V and leading French resistance against England.
The war’s resolution helped stabilize France, allowing Charles V to focus on rebuilding French power in the later phases of the Hundred Years' War.

The Battle of Auray (1364) was the defining moment in Brittany’s history, securing Montfortist rule and reinforcing English influence in the region, while also setting the stage for France’s resurgence under Charles V.