Horyo Eiyuu ~Sute koma ni sareta Kendo wa Tekikoku de Nariagaru~捕虜英雄～捨て駒にされた剣奴は敵国で成り上がる～; Captive Hero: A Disposable Swordsman Rises to Power in the Enemy Country

The heroes of war were "slaves". Eustacia is a country where those without magical powers are considered inferior. Dino, who had been a spectacle as a swordsman in such a country, is forced to go to war with Sandaria, but...? The strongest slave discovers the meaning of life in a new land in this battle fantasy rebirth tale