Ive played 2 Norman campaigns now, and in each one the Franks betray me and attack Paris once ive taken it, even if they are at war with the Danes. It kind of ruins the campaign as the Franks quickly get wiped out by me and the Danes, which then drags me into a long boring war with the Danes when really I want to follow history and invade Wessex.
I tried making peace/making the Franks my vassal, which they never accept regardless of their situation, is their anyway of stopping them backstabbing me in the first place? You start the game as allies and id like to keep it that way.