Return to the Ancient Times as an Emperor is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A passionate young man travels back in time to become an emperor. Faced with political marriages where women are sent as brides to foreign powers, and the shame of a weakened nation, he is enraged. He creates three thousand AK-47s and builds an army of a million wolf cavalry! As he dominates the world, beauties from all over offer themselves to him, while foreign tribes grow hostile. He says only one thing: “If you dare kill one Han of mine, I will wipe out your entire tribe!”