Li Zaiyi, a military instructor at the National Defense University, opens his eyes to find himself a minor deputy general in the Lulong Army in the late Tang. Just as the military governor Yang Zhicheng hosts a banquet to purge his rivals, Li is set to die by the sword in three days.
Fortunately, he knows exactly how this stretch of history ends. He wrote a thesis on how the Three Garrisons of Hebei descended into chaos, and he knows by heart how the military governors met their ends.
No System, no cheats, just a mind that can see the future and a modern military commander's skill.
He reforms the shattered troops, wins over both Hu and Han soldiers, and crushes neighboring garrisons. From a minor deputy general on the frontier, he rises to a position that makes Chang'an tremble. He is here to churn the late Tang's muddy waters into a storm.
It's a good book worth reading. The only royal descendant in the late Tang Dynasty was reborn as a military governor.