Answer:
Most authors have commented that the Huns did not invade the Xiongnu.
Step-by-step explanation:
This groups were nomadic warriors who terrorized much of Europe and the Roman Empire around the 4th and 5th century A. D.
There is a theory that the Huns are related to the Xiongnu, who were a Mongolian people and that they came later that the Xiongnu but is not verified yet.