Memoir Of The King Of War 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

Breathing does not guarantee everyone’s alive! Dan Sa Yu, a descendant of Goryeo, greatly reprimands the Central District for the sake of his friend whom he treasures the most. He reigns every battle! No one could stop him! Cheonpo Armed Forces. The greatest martial arts of Goryeo! The legend of Cheonpo Armed Forces lives on while the history of the King of War unfolds!