One of the annoying things with playing nomadic factions is that you have to actually rout your opponents to win. If you use an intellegent tactic such as using horse archers fire arrows at the enemy and then withdraw from the battle when they're out of arrows, you lose the battle (dispite inflicting massive casualties and sustaining very few), and your general retreats. Is this behavior hard-coded, or could you change it that if you kill more then x% of the enemy and only sustain y% casualties and withdraw, then it's a draw?