The battle for supremacy begins when the ancient world divides into two: Roman vs. Barbarian. Hannibal builds the first great alliance to defeat the barbarians of Rome before they are unstoppable. The general launches a bold and unprecedented campaign to strike in the heart of the Republic, conquering the Alps and leaving a death trail across Italy points to the capital. But while Hannibal wins the battles, he loses the war.

In ancient Hispania, Rome seeks revenge on the barbarian tribes who fought with Hannibal in their failed campaign to overthrow the Republic. Governor Galba massacred the Lusitanians, a Celtic tribe from the west of Iberia, and nearly annihilated the entire population. Survivors live as refugees in their own land. The barbarians use their knowledge of the ground in favor in order to continue the struggle, while Vetillius launches a large-scale chase to locate the rebel leader. The two sides meet in the Tribola Forest in a fatal crash.

Rome rules the Mediterranean with an iron hand and embarks on a strategy of domination through expansion. Conquering and enslaving the barbarians of every new territory they claim. But the more it grows, the more enemies it brings within its borders--a vast barbarian army latent, waiting for its leader to rise. Spartacus, the barbarian slave forced to fight as a gladiator, becomes the commander and the greatest threat to Rome in a century.

The Republic becomes an empire and follows a policy of Romanization designed to educate the barbarians, but even the first emperor, Augustus Caesar, is blind to the growing enemies within the very ranks of Rome. Arminius the son of a German barbarian chief surrendered to Rome as a child and becomes one of the highest-ranking barbarian officers in the imperial army, but when he was sent to his homeland to crush the ongoing rebellion between Your own people, you must decide where your loyalties are. The battle of the Forest of Teutoburgo pushes the Empire to the edge.

The Barbarian resistance increases in a do or die by confrontation with the Empire. The Germanic tribes are united for the first time under a single leader, Arminio, who creates an ingenious ambush designed to lead Rome outside its native land. The empire needs to expand to survive and sets its sights on the barbarian fortress of Britannia, where the Celts fight the invasion with unprecedented ferocity.

Boudica tries to beat Rome in their own wild game in one of the bloodiest rebellions in history. Centuries of costly barbarian wars have their effect on the Empire, putting an end to the age of expansion. However, an obscure growing and dangerous threat from the east leaves the Roman frontier in chaos. The Goths seek refuge in the arms of their enemy, Rome, but only find treason a fatal miscalculation by the Empire marking the beginning of an apocalypse of their own creation in Adrianople.

The Roman Empire is the world's first superpower, but it has grown so much that it is now more a weakness than an advantage, and the cost of keeping the barbarians at bay is high. Rome is divided into two empires with two emperors: East and West. Alaric leads his people to the gates of Rome, striking the first of a series of mortal blows against imperial power. The barbarians move to kill to achieve the regression of Roman expansion piece by piece.

The Huns emerge in the east and throw the ancient world into chaos; Attila takes power and begins a kingdom of destruction with one wave after wave, fighting on too many fronts. In the midst of chaos, the last great Barbarian leader Genserico, the king of calculation and cunning of the Vandals, becomes the architect of the destruction of Rome.