I am a rebel in another world

Slow-burning western fantasy, Knight Lord, no heroine! Dispensable cheat codes, released late! Henvel starts out as a commoner and plans to strive to become a noble, but he is dragged into the war at a young age. In order to survive, he joined the enemy camp, became a junior military advisor, and forged the world's strongest army. Unable to live a good life as a reward after the war, he was sold into slavery again. He was trained to be a gladiator, but before he could gain his freedom, he was bought as a substitute for a nobleman. After a bloody and scheming journey, he eventually replaced the original master and became a noble! And all this is just the beginning, a long journey...