[IronJack]

The Romans ventured across the Rhine briefly, before being repulsed.

Who sacked Rome?

[SeeSharp]

The Romans ventured across the Rhine briefly, before being repulsed.

The Romans maintained that border for 400 years. They traded across it and raided across it for the entire period. There were tens of thousands of German slaves in the Roman empire throughout the entire period.

Who sacked Rome?

The Visigoths - four hundred years after Rome's first contact with the Cimbri (German/Scandinavian/???).