After the death of Muhammad,
his son, Leto II, overthrew the last Byzantine emperor, Shaddam IV, and, marching into Constantinople with his fedakeen warriors, Leto proclaimed himself to be God-emperor of Earth.
his successors, the first caliphs, led the Arab peoples in a series of conquests, building an empire that covered most of North Africa and the Middle East.
his body was mummified and placed upon a throne in the Great Mosque of Mecca.
his son, Horus the Primarch, led an Arab navy that sailed up to the walls of Constantinople. Horus himself led a small group of soldiers over the walls of the city, but he was defeated in battle by the emperor on the very steps of the imperial palace.