Here you go.
Weapons Battle/Some achievements guide.
Mouse the warrior:
Weapons Style
Tell the nobles about Sobik.
Tell Elya option 3
Take the Lance instead of the Spear.
Grab Darin
Charge off to the side and then fall back to the walls.
Tell Elya option 2 or 3
Normal Walls fight
Tell Elya option 3 or 4
Take Darin’s choice for the sick.
Regimentation.
Tell Elya it’s enough.
War is hell for achievement.
Talk to priest for later achievement if religious.
No looking for lost nobles.
Let Elya take the lead for introductions.
IMPORTANT CHOICE
Choose the second option to give support to Elya if she is at leadership 5.
Recruitment Choices:
3 Archers
2 Light Cavalry
1 Infantry
The most optimal choice here is to build up defenses and then do the archer trap. For my own difficulty I will do setting up traps and having my archers skirmish backwards. FOR YOUR OWN SAKE, please choose Defenses and Archer trap. I am doing an unoptimal run for the sake of giving everyone a chance for success. The choices you should be making during this battle are the same either way so the guide will still work for archer trap defense.
If you are playing a religious character talk to the priest and undergo reconciliation for an achievement. If you are doing romances talk with Obren/Lada/Milon of your choice. Otherwise none of these desicions play a part on the battling aspect.
Save Dismas, or your soldiers, or Lada if you want an achievement. If you solely care about making sure you win 100% with the best possible army save your soldiers and leave both of them alone. To save Dismas choose the option to save him and keep your shield.
Shoot back at the enemy with your archers and let Elya give the order.
Don’t attack the party either join or leave.
Send your cavalry over the crossing.
Send Cavalry to the woods, send all your men they’ll do something funny later.
Ride out to inspire the troops.
You should have won now. Congrats. Send all your cavalry after them to decimate them.
Because you are a weapons marshall you can attack freely and if you hate vedran make him lose an eye.
Skipping a bunch of choices because they don’t matter.
Choose the Shorter path to Krorid.
Skipping more dialogue until you get to Moren
Too much of a stir choice and bluntly admitting you would rather see Tomos.
Choose your own drip for my character I chose Plate and warhammer to be a tiny female Robert Baratheon.
Choose to do Formation fighting.
3 Veterans from the war
1 light cavalry
1 infantry → Retinue
Skipping Dialogue as it is not important to achievements nor the battle.
Charge the enemy and artillery with your rangers.
Don’t have to worry about battle with weapons as it does it automatically.
FINAL BATTLE TIME
Retinue in the Center
Rangers in the Back
Drive off enemy cavalry with archers.
Turn our focus to the cavalry on the right.
Send the cavalry on the left to intercept.
Shoot the enemy archers with your own, send in the right group of cavalry to flank the enemy line.
Refocus your archers onto the enemy Infantry. Send light Cavalry to flank the enemy line, and pull men from the rear.
Join the Infantry and use your hammer to Unga Bunga. Or choose to charge with cavalry and kill your horse. Monster.
Congrats you won the final battle, enjoy the rest of the game.
Edit: I just did this run as of the newest update so it should work. In fact the guide can also be applied to Leadership and tactics both as I chose largely decisions that didn’t rely on my specialization and was able to win. So if you want to win without really caring about much here you go.