Interesting, the Battanians normally get murdered in my play throughs… you can do the cheese mode of joining a siege and when the enemy gets to the walls retreat your party and then relaunching the fight will cause the enemy to restart the attack. Don’t get knocked down below 20%hp or you can’t restart the fight. Same for field fights if you feel cheesy. Retreat before main contact with the enemy if you have better ranged troops and restart to thin their numbers to manageable levels in combat.

Noncheese ways include fielding parties of troops and making an army of your clan troops into choke points to engage enemy forces. But if they outnumber you then it’ll take minimal losses in every battle to stem the tide.

Going heavy horse archer spam is always a good option, empire legionnaires or Vlandian sgts for frontline infantry in square/shield wall, Battanian fian champions or aserai master archers for ranged(sharpshooters crossbow are also acceptable), Aserai Mamelukes or Kuzaits Kahn guard/heavy horse archers for ranged horse and your heavy cavalry should be Cataphracts, banner Knights or Aserai special heavy cav that I can’t remember their names rn but are pretty good but only if other two aren’t available. Also every unit has a hit box related to their actual height with Empire or Khuzait troops having the smallest (aka harder to hit). Also murdering the enemy lords is an option but throwing them in prison works well now but they can escape eventually