Dividing from the central or Italian fourth, three great divisions of the Empire separated into the West, East and Illyricum under Posthumus, Aureolus and Zenobia respectively—divisions that were later legitimized by Diocletian.
Its general subject is the decline and fall, after a previous prosperous era, of the Empire of Heathen Rome.
The series began its serialization in Weekly Shōnen Magazine in the 9th issue published on January 27, 2021, with a new chapter of the manga being released every week.
The color red, as well as the rider's possession of a great sword μάχαιρα, , suggests that is to be spilled.
The also revealed that the new series was tentatively titled The Four Knights of the Apocalypse, which he later changed by removing the word The at the beginning, giving the manga its current title.
Authority was given to them over a fourth of the earth, to kill with sword and with famine and with pestilence and by the wild beasts of the earth.