The Regressed Mercenary Has a Plan is an action-packed Manga/Manhwa/Manhua available in English. You can find the latest chapters translated on regressedmercenarysmachinations.org, the fastest updating comic site.

Summary:

Cecil Perdium, known as the Mercenary King, met his end in battle before he could avenge his family. As he faces death, he discovers that Duke Delphine, the architect of his family’s downfall, had accomplices. Miraculously, Cecil wakes up as his teenage self, giving him a second chance to restore his reputation and regain his strength to save his family. With soldiers and knights abandoning their posts due to unbearable conditions, Cecil has a daunting task ahead. Will he rise to become the formidable warrior he once was and change his family’s destiny?