Respuesta :

The answer would be invasion of people. And I am not just telling you this, I have a reason and here’s why:
The map has a label at the top. The label says Foreign Invasions of The Roman Empire. So, really the title of the map gives away the answer to your question.
Have a wonderful night!
~Brooke❤️

Invasions of people--many of the groups came as military and fought the Romans as invading forces.