Phew, it's very fortunate then, as I just beat a horde of French troop (~4000, with about 50% foot knights) in Ilse de France. But I may just go back an try the battle again just to see if I can make better kills this time.

Stills, I notice sometimes the list of heir changed with the oldest one being listed after some young prince, even though they are all from the current king. I need to look more closely about the "red" then. But thanks for the helpful tips.