The Congress of Arras was a diplomatic congregation established in Arras in 1435 between representatives of England, France, and Burgundy. Toward the close of the Hundred Years' War, both the Congress and Treaty of Arras represented diplomatic failures for England and major successes for France.
English negotiators entered the congress believing it was a peace negotiation between England and France only. They proposed an extended truce and a marriage between adolescent King Henry VI of England and a daughter of French king Charles VII of France. The English were unwilling to renounce their claim to the crown of France. This position prevented meaningful negotiation. The English delegation broke off from the congress in mid-session to put down a raid by French captains Xaintrailles and La Hire.
Meanwhile, the French delegation and leading clergy urged Philip the Good of Burgundy to reconcile with Charles VII. Burgundy was an appanage at the time, virtually an independent state, and had been allied with England since the murder of Philip's father in 1419. Charles VII had been at least complicit in that crime. The English delegation returned to find that their ally had switched sides. English regent John, Duke of Bedford died on 14 September 1435, one week before the congress concluded.
For the English (these 12):
and their prisoners, Duke of Orleans, Count of Eu
For the French (these and many more):
Mediating: Albergati, Cardinal of Cyprus
The congress gave rise to the Treaty of Arras, which was signed in 1435 and became an important diplomatic achievement for the French in the closing years of the Hundred Years' War. Overall, it reconciled a longstanding feud between King Charles VII of France and Duke Philip of Burgundy (Philip the Good). Philip recognized Charles VII as king of France and, in return, Philip was exempted from homage to the crown, and Charles agreed to punish the murderers of Philip's father Duke John of Burgundy (John the Fearless).