me: numerical superiority, all awesome generals (17+), full org, river crossing defensive bonus, better tech
vs
them: less numbers, mediocre generals, river crossing penalty, worse tech
and I lose every time. I can't even get a single one of their generals to route. What. the. hell.
Their are traits like sloth or arbitrary can give you some crazy bad tactics to were if you have the highest martial in the game and a 4 to 1advantge you still probably would lose the battle if all the generals had the traits.
edit here is a few examples form I shamefully took from the CKII wiki:
Reckless Charge 6 Charge
Skirmish
Not Flanking
Days = 10
Leader = Wroth Wroth.png or Aggressive leader Aggressive leader.png
10
3 - NOT Martial 7, Heavy Cavalry 1%
3 - NOT Martial 7, Heavy Infantry 1%
Heavy Cavalry Offensive +120%
Horse Archers Offensive +120%
Heavy Infantry Offensive +60%
Heavy Infantry Defensive -30%
Heavy Cavalry Defensive -50%
Horse Archers Defensive -50%
Change phase to Melee
Timid Advance 18 Advance
Melee
Heavy Infantry 1%
Leader = Craven Craven.png or Organizer Organizer.png
3
1.5 - NOT Martial 7, Heavy Infantry 50%
Pikemen Offensive +120%
Heavy Cavalry Offensive -210%
Heavy Infantry Offensive -210%
Changes phase to Melee
Stand Fast +120%
Confused Orders 18 Volley
Skirmish
Archers 1%
Leader = Lisp Lisp.png or Stutter Stutter.png
3
1.5 - NOT Martial 7, Archers 50%
Archers Offensive -120%
Horse Archers Offensive -120%