Which two groups were able to take over the city of rome in the late 300s and early 400s ad?

For a time some Germanic peoples were allowed to live peacefully within the Roman Empire. Many of them fought in the Roman army, and some became military leaders. Then, during the late A.D. 300s and the A.D. 400s, the Germanic tribes began entering Roman territory in large numbers. Their own lands were being taken over by a people from central Asia called the Huns.

By attacking the Germanic tribes, the Huns caused one of the largest migrations of people in world history. The migration of the Germanic peoples into the Western Roman Empire was more than just a movement of people, however. Some historians have called it "the migration of nations." Others consider it a time of invasion.

b) the confederacy had to pay all union war expenses.