Why did Philip the Good of Burgundy abandon the English alliance?

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Philip the Good of Burgundy abandoned his alliance with England and concluded a separate peace with the French king, Charles VII, at the Treaty of Arras in 1435.1

Several factors contributed to this shift in allegiance:

  • Strategic Realignment: By the early 1430s, the momentum of the war had begun to favor the French, particularly following the recovery inaugurated by Joan of Arc. Philip recognized the changing political landscape and sought to secure his own position by negotiating with Charles VII.21
  • Resolution of Civil Conflict: The alliance between Burgundy and England had been forged in the context of a bitter civil war between the Burgundians and the Armagnacs, fueled by the assassination of Philip’s father, John the Fearless. The Treaty of Arras allowed for a formal reconciliation; as part of the agreement, Charles VII condemned the murder of Philip’s father, and in return, Philip recognized Charles as his sovereign.23
  • Diplomatic Exhaustion: The protracted nature of the conflict had created general exhaustion on both sides, making the prospect of a separate peace increasingly attractive to Philip as he sought to consolidate his own power and territorial interests.1