If your sovereign has movement orders to move somewhere, and it connects with a roaming NPC champion (say a farmer), it auto-initiates combat dialog. Now I play with threshold at 0, so I can always choose whether to auto-resolve, fight manually or flee.
But I suspect default settings would initiate combat automatically with this farmer, and this would result in the somewhat (un)common #Elemental line of "man, a farmer beat my sovereign".
