It is 113 BC. The Cimbri smash through the northern imperial border to threaten Rome. Gripped by terror, Rome turns to General Marius, who will transform the Roman army and shake the Republic's political foundations to the core.
Near the end of the 3rd century, civil war has torn the empire apart and left its borders vulnerable to barbarian invasion. Romans living on the eastern and western frontiers, far from Rome, are left to defend themselves.
By the end of the 4th century, Romans and barbarians live together uneasily, a situation that often explodes into violence. When Emperor Theodosius enlists the Goths as mercenaries, he relies on his trusted general to lead.