What are the four main causes of the decline of Rome ? here I'll help
Overexpansion and military overspending.
Invasions by Barbarian tribes.
The rise of the Eastern Empire.
Economic troubles and overreliance on slave labor.
http://www.history.com/news/history-lists/8-reasons-why-rome-fell.
It is called a standing army
It was located in Constantinople, modern-day Turkey.
It created a strong central government. (Nova Net)
