The Black Prince had previously agreed to support Peter's claims but concerns over the terms of the treaty of Brétigny led him to assist Peter as a representative of Aquitaine, rather than England.
Den sorte prins havde tidligere indgået en aftale om at støtte Peters krav på tronen, men bekymringer i forbindelse med freden i Brétigny fik ham til at støtte Peter som repræsentant for Aquitaine, i stedet for England.