Olympias Conjures Ghosts in a Way That Forced the Other Side to Not Fight Her

Olympias is a necromancer of sorts, right? She conjures the dead. And she hasn't had an occasion where she's had to do that. We don't know how they, and I'm using air quotes with my hands, one of my old ancient copies of an ancient translation says changed allegiances. So exactly how it happened isn't known, but what is known is Olympias was able to channel the ghosts in a way that magically forced the other side to not fight her.