If they did we'd all speak Latin.
No, the Romans did not have those things. But in their day the Legion was the same thing. Ask Phillip V of Macedon or Antiochus IV of the Seleucid Empire.
My point is that the barbarians did not have them, either, nor could they replicate them or operate them. If the barbarians overrun the United States, a B52 will be to them the same as a straw and wattle "Cargo Cult" C 47.
History aint done yet.
They better take heed to Yamamoto’s prediction of Japan over running the the U.S.
When its the Cowboys vs. the Muslems, I know who is going to win.
Roman empire’s barbarians were way better than the islamic current ones .
They integrated the latin culture and became christians .....!!!
There a slight and little difference !