Three Kingdoms: at the Beginning of the Cao Camp, I Became a Natural Enemy in Troubled Times

Three Kingdoms + time travel + alternate history + cool writing Dong Tiandi traveled through the Three Kingdoms, and at the beginning, Cao's camp was in chaos. He did not make firearms and was not a magic stick. He only relied on his commander's vision to change the military system for Cao Cao, train Qingzhou, defeat Lu Bu, kill Liu Bei, burn Guandu, and pacify Hebei. Cao Cao doubted him, but did not dare to use him. Because he is not the Emperor of Heaven. He is the natural enemy of all heroes in troubled times.