The Long Way Of The Warrior 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.nl fastest updating comic site. The Summary is

In the second half of the 2nd century, the warrior of the Mahan Federation Gori, Naru, was sold as a gladiator to the Roman Empire and struggled for freedom.