There are numerous ways to gain RTR.
Some examples;
If you are a vassel and persuade another Lord over to serve your King.
/Side affect, Just cause for them to declare war on your faction.
If you are a King and persuade a Lord to join your cause.
/Same affect, The other faction will declare war on you.*
Send out your companions on missions. 3 RTR each. Possible 60 RTR.
/Side affect, After you have 30 RTR you lose the option to become a Vassel.
If you are a vassel and your faction makes peace.
/Freebee..
If you are a King and make peace with another faction.
/Side affect, X3 RTR gain.
If you are a Vassel and Elope a Bride from another faction.
/Side affect, -10 relation with your King and just cause for war. + the Neg relation with all involved with the Bride.
*Hey if you need to start a war in times of boredom,
On the side, @Tuco,
You will find Pendor is a whole other world from Native.
There is nothing good that will help you by destroying innocents.
You are now a Hero that came here to Save Pendor from Evil.
Welcome to Pendor,