But PJ had the women and children in the caves at Helm's Deep to raise the stakes of the battle, so he had to so something with them. Not necessary and a bit awkward, IMO, but there you go. At least he deleted the subplot about the Edoras kids' mother (Morwen was it?) giving birth.
Regardless, the women of Tolkien's Rohan and the women of any of his societies were not usually warriors.
This is getting kind of far from Bard and his three adorable
childrem so I'll shut up now.