Emperors Diocletian's 'Tetrarchy', a hierarchic system of four emperors, fails as they soon fight each-other. Autumn 321, co-emperor Constantines army prepares north of Rome to defeat his tyrannical western rival Maxentius. Clerk Lactantius, whose writings are the major source for this film, tries to convince Constantine to put his faith in the secretive slave religion, Christianity; something in the sky, perhaps a striking meteorite, is taken as a divine sign; he adopts the PX-emblem -crossing Greek letters chi and ro for Christ- to mark his troops' shields, even though the men are reluctant to betray the pagan gods. Maxentius, who just received major reinforcements, bringing his strength to 75,000, lays a trap at the Milvian bridge over the Tiber, but it fails and he drowns. Constantine promises his reign will liberate the people and restores goods and senatorial authority, making his entry a true triumph. Now he turns his attention to the easter half of the empire, and marries off ... Written by
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Constantine the Great
The army of Rome matches... in the name of the one true God!