War Of Truth (Tales Of The Allyesse) by Colin Farmer

Cyrus Thorne, a recent graduate from the prestigious Alcara Academy, is called upon by the Goddess to save the World. He fights within the Allyesse, a militia that wishes to one day bring peace into their homeland by overthrowing the Empire of East Develior. However, as the war continues to drag on, Cyrus and his allies begin to unravel the mysteries of not only their World, but the other Worlds within their Realm as well. A conspiracy involving the deities of the Realm, Akcel and Ariadne, begins to shake the foundation of reality as hope for a peaceful end to the fighting continues. To make matters worse, Cyrus and the Empress were best friends in the days long passed. The grand journey of the Allyesse begins as the end of the World draws ever near...