I actually just did it as my default cause I like the idea of giving them the option....(role playing) but I was really surprised when the betrayed King Harlaus said he would let me go this time. I didn't know he could be generous in the face of civil war. It let me go change out my unit setup and then come back to face him like a man... 9 companions, 16 swadian knights, and the rest huscarls on open field. I didn't lose a man that whole battle. The king was knocked out by a lance in the charge. Poor poor soul.