John IV de Montfort’s Return to Brittany …

Years: 1362 - 1362

John IV de Montfort’s Return to Brittany and the Fragile Peace (1362)

By 1362, under pressure from Pope Innocent VI, the English, French, and Breton factions negotiated a tenuous peace in the War of the Breton Succession (1341–1365). However, while both the House of Blois and the House of Montfort maintained an uneasy balance of power, tensions remained unresolved within Brittany.


John IV de Montfort’s Return to Brittany (1362)

  • The younger John de Montfort, son of the late John III, had been raised at the court of Edward III of England after his father’s death in 1345.
  • In 1362, at the age of 22, he was permitted by Edward III to return to Brittany, but under strict conditions:
    • He was forbidden to marry without Edward’s permission.
    • He had to pledge several fortresses as a guarantee of his loyalty to England.

An Attempt at Peace with Charles of Blois

  • Upon his arrival in Brittany, John IV sought to negotiate peace with his rival, Charles of Blois, in an attempt to reach a settlement and share power within the duchy.
  • His proposal to divide Brittany was meant to end the decades-long conflict and stabilize the region.

Joan of Penthièvre’s Opposition to Peace

  • Charles of Blois' wife, Joan of Penthièvre, vehemently opposed any settlement with the Montforts.
  • She urged Charles to reject John’s offer and instead push for his total destruction, viewing him as a threat to her family’s claim to the duchy.
  • Encouraged by Joan, Charles continued to resist Montfortist claims, ensuring that the war would not end peacefully.

Consequences: A Renewed Conflict

  • John IV’s return to Brittany rekindled tensions, as the fragile peace crumbled under the pressure of political rivalries.
  • The failure of negotiations set the stage for the final phase of the War of the Breton Succession, culminating in the Battle of Auray (1364), where Charles of Blois would meet his end.

John IV’s return to Brittany in 1362, though an effort toward reconciliation, ultimately led to renewed conflict, as Joan of Penthièvre’s insistence on continuing the fight ensured that the Montfort-Blois struggle would persist until a final military resolution.

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