 The 'Arbre des batailles' was a main source for Christine de Pizan's 'Livre des fais d'armes et de chevalerie' (Book of Deeds of Arms and of Chivalry), and her writing was in turn popularized by William Caxton in England.Jean Courtois, herald of Alfonso V of Aragon, also used Bonet extensively in his 'Blason des Couleurs'.Martin van Creveld writes that Bonet's subject "was not so much military theory and practice as the art of 'chivalry' and the rules of war."