After that you will fight for this kingdom, but you won’t become a part of it.Īs you fight more and more, you earn more glory, and people start to understand your role in the kingdom that you have joined. It’s quite easy to do, you need to find a lord in the castle and ask him to join you as a mercenary. To become a vassal in Bannerlord Mount & Blade II, you must first become a mercenary to the kingdom. How to become a vassal in Mount and Blade 2 Bannerlord. Study this guide to learn how to become a vassal in Mount and Blade2 Bannerlord. If you want to become an official member of the kingdom government, you can do so by becoming a vassal.