From the Start, I Commanded the Zi Army and Became Blue Star's Emperor

A modern military enthusiast’s soul enters the body of a man in the Great Qian dynasty. The original owner was loyal to the emperor, but was tricked into surrendering the throne and died of rage in the Golden Hall. The court is rotten, the empress wields absolute power, the princes vie for the throne, vassal kings rule their own territories, and the people are suffering. On the brink of death, he unexpectedly obtains a System and binds himself to the “Strongest Commander System.” As long as he preserves his yang essence, he can summon elite troops without limit and claim high-tech gear at will. While others pile up bodies to win wars, he can summon thousands of troops with a flick of his finger. He puts down a palace rebellion in one move, and the vicious empress’s beauty trap is exposed on the spot. Once mocked as a good-for-nothing, the prince now crushes every opponent. He ascends the throne, takes the reign title Qianyuan, and his iron cavalry brings seven continents to heel. From a man everyone trampled on to the ruler of Blue Star, he’ll have it all.