The Always Losing General loses again

Synopsis

When Tina, the princess of the strongest mercenary troop Knights of Vathermund, enters battle for the first time, she meets du Darkus, a legendary mercenary general best known for losing every war he's been involved in. In a treacherous war-torn world, faced with overwhelming odds, how does Darkus the Defeated General survive? (Source: Japanese Publisher, Anilist)