Answer:
The Roman Empire was known to be one of the (if not the) most prominent and fierce expansive empire in history.
Explanation:
(I don't quite know what you are asking, but I'll give it a go).
The Roman Empire was one of the largest empires documented in history, as there territory expanded over areas such as Europe, Asia, and other regions. They ruled for quite some time before their "great fall" and were vanquished due to their internal corruption and the inability to withstand multiple attacks from the borders (big space with a limited population = not enough soldiers to occupy the borders all the time effectively).
Hope this helped!