The Roman Empires had fought a series of wars with pre-Islamic Persian dynasties from 92 BC to the 7th century AD - when the Muslim conquest of Persia caused the downfall of the Sasanian Empire.
Belisarius is the much underrated military commander of the Byzantine Empire who helped reclaim huge swathes of the Roman Empire.
Why empires fall is a question that fascinates many. But in the search for an answer, imagination can run wild. Suggestions ...
Other major gods included Mars (god of war), Mercury (god of trade ... In the same way, the Persian god Mithras was popular with the Roman legions – many of whose soldiers had served in Persia ...