Question

Why was the hiring of Germanic mercenaries by western roman emperors a mistake?

a. regular Roman army joined with the mercenaries to attack the eastern Roman Empire.
b. The Germanics lacked loyalty to Rome and sometimes bought against the empire.
c. The regular Roman army rose up against them are mercenaries and killed many of them.
d. The Germanics were poor soldiers who cannot handle Roman weapons

Answer 1

"b. The Germanics lacked loyalty to Rome and sometimes bought against the empire" is the best option from the list, since the Germanic tribes had very little connection to Rome or its empire and were just interest in getting paid.