Elizabeth Moon 
Oath Of Gold [EPUB ebook] 
Book 3: Deed of Paksenarrion Series

Paksenarrion — Paks for short — was somebody special. Never could she have followed her father’s orders and married the pigfarmer down the road. Better a soldier’s life than a pigfarmer’s wife, and so though she knew that she could never go home again, Paks ran away to be a soldier. And so began an adventure destined to transform a simple Sheepfarmer’s Daughter into a hero fit to be chosen by the gods.