Whenever Rin aced the Keju (the test given to people all across the Empire to select the brightest young people to get to study at the Academies), she was accepted into Sinegard. Sinegard is the most elite military academy in the Empire. Her life completely changed in a few short years. 

This book was incredible. The amount of world building had my head spinning. I loved it, even if it was a lot to take in. This is one of the best fantasy books I have read in a while.