Rakuin no Monshou III Ryu no Tsubasa ni Ten wa Kageru

is the third volume of the Rakuin no Monshou light novel series, written by Tomonori Sugihara and Illustrated by 3. It was released under the Dengeki Bunko Imprint in April 2009.

Synopsis
Stopping the Rebellion in the Imperial City Solon The ever-increasing fame of Orba is ordered by the emperor to go to the remote Fort Apter. It was once occupied by Virina's homeland, Gerbera, and was about to be returned to Mephius. And it was rumored that the neighboring country, Tauria, would invade the plane. Orba who led a few forces such as the guards of the former sword slave and advanced to the upter with Virina. Meanwhile, Gerbera was about to open a battle with the Principality of Ende and needed Mephius reinforcements. In a situation of immediate promptness, what is the attitude of Orba, who has only mercenaries?

(source: Bookwalker JP - Translated)