I know: the title probably smells ASB for most people here. But is there any realistical way to do this?
The personnal idea that came to my mind was actually linked to Joan of Arc surviving by avoiding capture. She would then have fought until the end of the Hundread Years' War, eventually becoming some sort of a legend (though she kinda already is OTL). This would eventually have inspired a few noble women to fight by her side or at least follow her example. In the end, we would end up with a Knight Order (that I personnaly call "Order of St.Joan" or "Joanine Order") made only of female knights that use Joan of Arc as their ideal, most notably with the members making a vow of chastity (because the Pucelle d'Orléans remained her virgin according to chroniclers).
Though to me it's an interesting idea and a fun concept, I only see this happening in a Fantasy fiction, making it ASB. But what do you think of it personnally? And do you have your own ideas on the matter?