A free mod for Mount & Blade II: Bannerlord, by Light.
The Remove Respawn Party mod removes the “out-of-nowhere party” when AI lords respawn. They now have an adjustable number of troops on the new game start and upon respawning. The default is 3 to prevent them from falling victim of the looters. The number can be adjusted in the PartyFixes and Win64_Shipping_Client settings.
A party is a group of enemies that are stronger than you. In a battle, you will fight with all of them at the same time, and the one that is the strongest will kill you. In the game, you will never be alone, you will always have a party.
In this mod, the AI lords have a new way to spawn. When you kill them, they will drop loot, and you will get a part of that loot as your reward.