Betrayed and Beheaded, the Mercenary KING Came Back With a PLAN — FULL Manhwa Recap

He became the Mercenary King, the man who won every war, one of the Seven Strongest Men of the Continent, cut off his head and told him Duke Delphine had planned the fall of his house. He woke up in his young body, one year before House Perdium is destroyed. However everyone still sees the violent, useless heir. They don't know he remembers how every war goes, who betrays whom, and which nobodies become legends, and that he already has a plan.