The Failed English Offensive in Brittany and…
September 1345 CE
The Failed English Offensive in Brittany and the Death of John of Montfort (1345)
After the initial successes of the English-led Montfortist campaign in 1345, the follow-up efforts in Brittany proved far less effective. Further offensive operations were delayed until July, when John of Montfort attempted to recapture Quimper. However, French reinforcements arrived in time to turn the tide, leading to a Montfortist defeat and Montfort’s subsequent death, leaving his five-year-old son, John IV, as his heir.
The Failed Siege of Quimper (July 1345)
- John of Montfort, with English backing, sought to recapture Quimper, an important stronghold lost to Charles of Blois in 1344.
- However, news had reached the French government that Edward III had canceled his main campaignelsewhere, freeing up reinforcements from Normandy.
- Philip VI redirected these forces to Brittany, strengthening Charles of Blois’ army.
French Victory and Montfort’s Retreat to Hennebont
- With his reinforced army, Charles of Blois broke the Montfortist siege of Quimper, routing Montfort’s forces.
- Defeated, Montfort fled back to Hennebont, one of the last Montfortist strongholds in western Brittany.
- Shortly after his return to Hennebont, John of Montfort fell ill and died on September 16, 1345.
A Child Heir: John IV of Brittany
- The Montfortist cause now rested on the shoulders of his five-year-old son, John, making the faction even more dependent on English support.
- The death of John of Montfort was a significant blow, but his widow, Joanna of Flanders, remained determined to continue the struggle, ensuring that Brittany remained a key battleground in the Hundred Years’ War.
Impact on the Breton War of Succession
- The French victory at Quimper and Montfort’s death temporarily stabilized Charles of Blois’ position, but the war was far from over.
- The English had suffered a setback, but their interest in Brittany did not diminish, and they would continue backing the Montfortist claim in the years ahead.
- The Breton War of Succession (1341–1365) would now enter a new phase, with the widowed Joanna of Flanders and English commanders leading the resistance on behalf of her young son.
John of Montfort’s death in September 1345 marked a crucial turning point in the Breton War of Succession, but the Montfortist cause lived on through his son and the continued intervention of England.