Dear Bernard
I wondered of you’d seen this article on Najera and wondered if you’d ever considered it as a sequel to 1356 As a battle it did feature Bernard DeGuseclin, who after Joan of Arc one of the most famous French soldiers of the Hundred Years War http://paginaspersonales.deusto.es/abaitua/kanpetzu/primate/najera1367.htm
Regards
Geraint