But with the III century dusk empire. Suddenly it turned out that Italy overstrained, building an empire. Italy can no longer deliver the required number of legions. "Soldiers emperors" with the Danube, from Africa or Gaul began to seize the crown of emperors and play it as they wanted. Even more ominous phenomenon - it turned out that the peoples of the empire are no longer willing to submit to its center. Parts of the empire is no longer needed as a whole, they can live on their own. Empire begins to crumble, it invading aliens, which would easily beat back a hundred years ago. In the V century the Western Roman Empire was no more.