Iron Blade in the Late Han Dynasty: Yan Liang Brought the System to Change the Fate of the Three Kingdoms

This is the fate of a time traveler who must die. It is not just about personal survival, but bringing brothers, changing camps, training strong soldiers, developing skills, and finally finding a third way in the troubled times of the Three Kingdoms - neither completely loyal to Cao Wei, nor self-proclaimed king, but using "iron blades" to stop the war, reduce casualties in troubled times, and become an "invisible pillar" that is not recorded in history books but truly changes the direction of history.