Conversation so far:
What happened in the 3rd century regarding Migration Period Art?
In the 3rd century, the Roman Empire almost collapsed and its army was becoming increasingly Germanic in make-up.
What happened in the 4th century to Germanic tribes?
In the 4th century when Huns pushed German tribes westward, they spilled across the Empire's borders and began to settle there.

Question: What did that do tothe army
Self-contained rewrite: What did Huns pushing German tribes do to the army in the 4th century?