Read Reincarnated as the Archduke’s Son Chapter 50 online for free at Manga18toon. This is chapter 49 of 56 available.
A mercenary captain dies on the battlefield, having never advanced in life because of his lowly bloodline. When he opens his eyes again, he learns that he has been reincarnated as the third son of an archduke—now blessed with the prestigious family, status, and innate talent he always dreamed of.