Madan no Ou to Michelia

The Lord Marksman and Michelia novel series is an alternative parallel world to Kawaguchi's Lord Marksman and Vanadis light novel series, with Ludmila instead of Eleonora as the main heroine. In this alternate world, Zhcted does not declare war on Brune, but instead forms an alliance to wage war against the kingdom of Muozinel. A young man named Tigre goes to war in his father's place, and his first taste of battle begins to go well, until Brune's battle lines crumble to an ambush. The commander of Tigre's unit flees, until Ludmila, the Vanadis warrior of Olmutz, comes to the rescue. Two years after that battle, Tigre and Ludmila have a chance reunion, just as the curtain is raised on a new war, and a legendary evil awakens.

(Source: Anime News Network)