Better yet, try to fight monsters/undead on your own. That works wonders for your honour and prestige.
Think my character in Sorraine gained much more h/p while staying at home slaying monsters than the noblemen who went out to a long distance war.
Yes, fight monsters, undead on your own.
The less people join in the battles, the more higher prestige and honour you stand to gain.
Of course measure the monsters, undead Combat Strength(CS) against your men strength and ability CS.
Do not fight against the odds here, as this is Battlemaster purely consists of strategy and strength, not casino