When armies clash you compare their numbers, but also decide what greater factor is at play for deciding the fate of the battle,
as per one mechanic in this post on anyway. I'm not sure whether you should choose this factor based on a random draw, a secret vote, or what...
The Five Constant Factors:
- General : each army leader chooses a General Card from their hand to play (put at risk!)
- Method & Discipline : either a Tactics card is chosen, or you just count up the number of troops with no bonus
- Earth : the terrain the battle takes place on decides (rivers count if crossed by the attacker)
- Heaven : a draw from the "fate deck"
- The Moral Law : uninvolved players "vote" (with all due bribes, deals, etc) for which party to be favoured