You say something about being the last of your division, who were all killed by Bandits earlier. The Roamer is skeptical, but believes you. He tells you to jump up onto his horse. You do so, and he rides you to the Roamer camp.
There, he explains your story to first the guards, and then the commanding generals. You are applauded, and told that for your bravery you will lead a group of the Roamers's feared elite troops: PKers. Now is your last chance to tell the truth.