What was a challenge that resulted from the Roman Empire’s large size? The empire was lacking in natural resources.
It was challenging to trade with other regions.
It was difficult to defend all areas from attacks.
The empire faced crowding issues due to overpopulation.

The sheer size of the empire eventually became problematic - it was too large to manage and became more susceptible to barbaric invasions. In 284 CE a new emperor came to power. His name was Diocletian, and he understood the problems facing the empire.

Explanation:

sorry my answer is different and i didnt took answer from your points.

yes.

explanation:

because it let the japanese know who had the upper hand in the war.