French navy defeated at Sluys. War of succession breaks out in Brittany between Charles of Blois and John of Montfort. When Montfort is captured, his wife continues the fight on his behalf. Edward devastates Normandy. The siege of Calais begins.
Bubonic plague spreads through France, then England.
The French win by treachery. Edward renounces his claim to the French crown. John is ransomed for 3 million gold crowns. A territorial compromise is reached but sovereignty of Guyenne is still unsettled. French raids on English coastal towns.