Itsuwari no Dragoon IV

is the fourth volume of the Itsuwari no Dragoon light novel series, written by En Mikami and Illustrated by Yu Shiina. It was released under the Dengeki Bunko Imprint in August 2010.

Synopsis
The Legalion Empire begins an invasion of the Kingdom of Serov. Victor's eerie sentence became a reality, and the Knights' Academy finally went to the battlefield. The Kingdom of Serov had already withdrawn from half of the country in order to bring it into endurance warfare. At that time, Jean finds out that there are civilians left behind and secretly plans to rescue him. However, it was an unreasonable move from deep into the occupied territories. In order to break through the inspection, Chris and Tiana disguise themselves as nuns, and Jean turns into a farmer, but the enemy is not a fool either. Everywhere I go, I fall into an unexpected situation !?

(source: Bookwalker JP - Translated)