Hu Hai, the second emperor of the Qin Dynasty, was possessed by someone who traveled through time. When faced with internal and external troubles, he started to fight. He killed Zhao Gao, fought against Xiang Yu, joined Liu Bang, captured Zhao Tuo, destroyed the Huns, and even fought for control of the Maurya Dynasty in India. He went on an expedition to Syria, captured Hannibal, and conquered Europe, Asia and Africa.
It's well written, not too much spoofing