All you have to do is locate an enemy general on the ground. However, there is always a way to discuss peace with your enemies. However, these two functions do not seem to work properly yet because both are constantly disabled. If you have already checked the Kingdom interface, you will see that you can both declare war and barter for peace. How to Make Peace in Mount & Blade II Bannerlord An easier, cheaper, and safer alternative is to beat them with love.
Fighting them face to face is a difficult and expensive challenge, even if you know all the money to do tricks. At this point, several factions of the Empire will do their best to take you down.
Later in the game, after finding all of the nobles and gathering the Dragon Banner, you’ll fight an ever-growing conspiracy. This is also part of the main quest line. Whether you own one kingdom or join another, you will end up going to war. This guide explains how to make peace in Mount & Blade II Bannerlord as the UI does not appear to support the ability to declare war or sign a peace agreement during this early access period. You will go to war at some point, it is inevitable. : How to make peace and declare war in Mount & Blade II Bannerlord