It was actually Oligarch who abandoned Eponllyn to the Perdanese, not Sirion.
What I wrote before about not standing for others ending up with no one standing for yourself. My character advocated Xavax/Fallangard to take more of a stand for Fallangard's ally and balanced that war, warning them they'd be next for Perdan, but they did not. So Eponllyn was not going to sit around being Perdan's punching bag waiting for someone to balance their war and Perdan was able to wrap things up nicely to head towards Xavax/Fallangard, who now want Eponllyn's assistance balancing the war they just exited being torn apart and don't wish for an iota more.
