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triggering an early great migration by german and gothic tribes.
What is in your opinion going to happen?
Is the Rome Republic/Empire going to survive?
Is this event feasible before 400AD ?
As far as I know the Roman legions were ill suited to face horse archers, but maybe a Roman Republic could act more energetically than a decaying Empire and could face successfully the enterprise like it did against Carthago and the Cimbri and Teutons invasion